TASK DEFINITION: You are given a question or fill-in-the-blank question, two answer options (Option1 and Option2) and an Explanation. Your task is to find the correct answer (return the string of the correct option, not option1/2) for the given question from the given options and using explanation.
PROBLEM: Question: Rick has a flat magnifying glass while Jimmy has a curved convex lens. Who likely can magnify the objects better?
Option1: Rick
Option2: Jimmy
Explanation: The more curved the convex lens is in a magnifying glass, the greater its ability to magnify objects.

SOLUTION: Jimmy

PROBLEM: Question: If a person sank lower within the mesosphere, would the temperature
Option1: increase
Option2: decrease
Explanation: In the mesosphere, temperature decreases as altitude increases.

SOLUTION: increase

PROBLEM: Question: African Americans have darker skin than other Americans. Researchers were not surprised to discover therefore, that vitamin D insufficiency among African Americans is _____ than among other Americans?
Option1: more prevalent
Option2: less prevalent
Explanation: Pigments in the skin act like a filter that can prevent the skin from making vitamin D. As a result, people with darker skin need more time in the sun than people with lighter skin to make the same amount of vitamin D.

SOLUTION:
more prevalent