instruction:
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").
question:
In the 60's people watched on TV while for the first time people walked on (A) a high rooftop in a major city (B) a satellite without much air in our solar system (C) the edge of a cliff in the mountains (D) a beach in Brazil
answer:
B


question:
Flowers with more pollinators (A) escalate reproduction (B) increase water usage (C) increase visual appeal (D) decrease reproduction
answer:
A


question:
A ficus can help respiration because it: (A) absorbs oxygen (B) releases oxygen (C) absorbs helium (D) releases carbon dioxide
answer:

B