Correct Answer: A

Rationale: Araminta Ross came to be known as Harriet Tubman after marrying a free black man named John Tubman. She took her husband's last name 'Tubman' and changed her first name to 'Harriet,' which was her mother's name. This change of name was a personal choice after her marriage and not because she was named after the plantation owner's wife (B), wanted as an Underground Railroad runner (C), or to remain anonymous as a Civil War spy (D). Therefore, the correct answer is A.

Correct Answer: B

Rationale: The first thing you should do to help the student is to provide guidance on how books are arranged in the library, which is by the author's last name, as observed in the science book section. By explaining this system to the student, you empower him to locate the books independently. This approach fosters self-reliance and problem-solving skills. Choice A is incorrect as it delays addressing the immediate need, which is helping the student navigate the library. Choice C is also incorrect as it suggests postponing assistance to a later time. Choice D is not the best course of action as it doesn't directly help the confused student in the moment.

Correct Answer: C

Rationale: Source C provides the best material for the assignment because it emphasizes the importance of preserving wetlands, acknowledges the endangered status of wetlands, and suggests a solution involving private donors. The source highlights the crucial issue at hand - the disappearance of wetlands - and proposes a practical solution, making it a reliable and relevant source for an assignment on wetlands conservation. Choice A focuses more on the profit aspect rather than conservation. Choice B blames greedy businesses without offering a practical solution. Choice D discusses the relationship between businesses and wetlands but lacks a clear solution for conservation compared to Source C.

Correct Answer: C

Rationale: The correct answer is C, compromise of the immune system. The passage states that alcohol abuse can weaken the immune system, making individuals more susceptible to infections and illnesses. This compromise of the immune system can lead to various health issues and exacerbate existing conditions. Choices A, B, and D are incorrect based on the passage. While the passage discusses the impact of alcohol abuse on magnesium absorption and kidney function, it does not directly attribute these issues to alcohol abuse. Gastrointestinal disorders are mentioned in relation to magnesium absorption but are not specifically linked to alcohol abuse.

Correct Answer: C

Rationale: Choice C is the best summary of the article. It encapsulates the key events that occurred, including President Lincoln being shot at Ford's Theater, the attack on Secretary Seward and his son at their home, and General Grant avoiding harm. It accurately reflects the major developments and outcomes of the tragic events described in the article. Choices A, B, and D are incorrect because they either focus on specific aspects of the events and omit critical details or introduce irrelevant information not present in the article extract.