Question

Question was provided via image upload.

Explanation:

Identify the underlined portion and its context

The underlined portion is "Before the discovery," which begins the second sentence. This phrase refers back to the discovery of the molar in Laos mentioned in the first sentence.

Analyze the function of the phrase

The phrase establishes the historical context (what scientists previously believed about Denisovans) before the new discovery was made. This contrast clarifies the significance of the new finding, which is detailed in the rest of the sentence (that they lived in warm, low-altitude climates, not just cold, high-altitude ones).

Evaluate the given options

• (A) is incorrect because "Before the discovery" does not define any term.
• (B) is incorrect because it does not state a research goal.
• (C) is correct because it sets up the background context that explains why the new discovery in Laos is so significant.
• (D) is incorrect because the passage does not dismiss the previous research as untrue, but rather updates it with new geographical range data.

Answer:

• (A) It defines a term used in the description that follows in the rest of the sentence.
• (B) It emphasizes the main goal of the research introduced in the previous sentence.
• (C) It provides context that clarifies the significance of the information that follows in the rest of the sentence. (Correct answer)
• (D) It dismisses as untrue the research presented in the previous sentence.