Which of the following is an opinion, rather than a historical fact, expressed by the author?

Correct Answer: C

Rationale: The statement 'Leif Erikson deserves more credit for his accomplishments' is an opinion rather than a historical fact. Historical facts can be verified through evidence and documentation, while opinions are subjective viewpoints. Choices A, B, and D provide historical facts about Leif Erikson's lineage, the name given to the land he discovered, and his exploration, respectively, which can be supported by historical records and research.

Correct Answer: B

Rationale: The correct answer is B, Cobra. In the food chain diagram, cobras are often considered apex predators, meaning they are at the top of the food chain and do not have natural predators. Vultures (choice A), although scavengers, may face competition but not direct predators. Mongooses (choice C) are known for preying on snakes, including cobras, and aardvarks (choice D) are part of the food chain and have predators like lions and hyenas.

Correct Answer: D

Rationale: The correct answer is D, radius. According to the passage, the radius is a bone in the lower arm, not in the leg. The femur, tibia, and patella are bones associated with the leg. The femur is the thigh bone, the tibia is the shin bone, and the patella is the kneecap. Therefore, the radius is the only bone among the options that is not associated with the leg.

Correct Answer: B

Rationale: The correct answer is B, metacarpals. The metacarpals are the bones located in the hand, making up the palm and connecting to the fingers (phalanges) and wrist bones (carpals). The fibula and ulna are located in the leg and arm respectively, while the metatarsals are found in the foot. The axial skeleton consists of bones down the center of the body, including the skull, vertebrae, and ribs, while the appendicular skeleton includes bones of the arms, legs, and their attachments to the axial skeleton.

Correct Answer: C

Rationale: The author's likely purpose in writing this passage about Queen Victoria is to explain how small events in history led to an unlikely princess becoming the queen of England. The passage details the series of events that changed the course of British succession and highlights Victoria's unexpected path to the throne. It focuses on the historical process that resulted in her becoming queen, rather than persuading the reader to appreciate her accomplishments, introducing the Victorian Era as a whole, or discussing the role of other historical figures like King George III's sons.