TASK DEFINITION: In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").
PROBLEM: If a mother mammal wants to give her offspring proper nutrients, she would utilize her (A) whiskers (B) toes (C) tail (D) areola

SOLUTION: D

PROBLEM: A mountain top heats and lava flows, resulting in (A) a hot golden leaf (B) a cold deep sea (C) a raised portion of land (D) a sunken valley of ice

SOLUTION: C

PROBLEM: Scientists are experimenting to develop microbes that can live off surplus electricity and CO2 to produce (A) organic products, such as methane, acetate and butanol as economic biofuels (B) less electricity and more CO2 (C) solar energy and biofuels in the laboratory (D) fewer biofuels like butanol and less CO2

SOLUTION:
A