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: Some male fish return after just ____ years.\Question: Choose the right answer from options given a) no b) two c) one d) six

SOLUTION: b

PROBLEM: Chipmunks produce one or ____ litters a year.\Question: Choose the right answer from options given a) three b) one c) ten d) two

SOLUTION: d

PROBLEM: Water potential is ____ in an open system.\Question: Choose the right answer from options given a) seven b) one c) zero d) two

SOLUTION:
c