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.

Correct Answer: A

Rationale: The word 'cation' refers to a positively charged ion, which is an atom or molecule that has lost one or more electrons. It is not related to nutrients, symptoms, or supplements. Therefore, the closest in meaning to 'cation' among the given choices is 'element.' In the provided extract, it mentions that cations like magnesium can affect the body's ability to absorb other cations, including calcium and potassium. This further emphasizes that 'cation' is related to elements rather than nutrients, symptoms, or supplements.

Correct Answer: A

Rationale: If you are among the people for whom a flu vaccine is recommended, the best course of action is to call your doctor for an appointment and get the vaccine. Getting vaccinated can help protect you from getting the flu and reduce the spread of the virus to others. It is important to prioritize your health and take preventive measures, especially during the flu season.

Correct Answer: C

Rationale: The central idea of the passage is that there are many different kinds of self-improvement classes available. The passage discusses various topics such as cooking, yoga, language learning, and computer skills, emphasizing the range of options for self-improvement classes. This choice captures the main theme of the passage focusing on the diversity of available classes for personal development.

Correct Answer: D

Rationale: Jenson should check section 800 for more resources on the written plays that have survived from ancient Greece. Section 800 generally covers literature and includes works of literary criticism, which would likely have information on ancient Greek plays, playwrights, and theatrical practices. Choice A (200) is for Religion, not related to ancient Greek plays. Choice B (600) is for Technical and applied science, unrelated to literature. Choice C (700) is for Arts and recreation, more related to the performing arts but not specifically focused on written plays from ancient Greece.