TASK DEFINITION: Given a sentence with a missing word, pick the answer option that best fills out the missing word in the sentence. Indicate each answer with its index ('a', 'b', 'c', 'd').
PROBLEM: Cows can be up to ____ times more active than normal while in heat.\Question: Choose the right answer from options given a) eight b) nine c) two d) six

SOLUTION: a

PROBLEM: Pupae usually transform into adults ____ to three days later.\Question: Choose the right answer from options given a) one b) two c) no d) eight

SOLUTION: b

PROBLEM: Pygmy marmosets are only about ____ inches tall as adults.\Question: Choose the right answer from options given a) six b) no c) ten d) nine

SOLUTION:
a