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: Potassium helps maintain fluid regulation and normal pH. All ____ help normalize.\Question: Choose the right answer from options given a) three b) six c) two d) one

SOLUTION: a

PROBLEM: Humans learn through the ____ senses.\Question: Choose the right answer from options given a) eight b) one c) five d) ten

SOLUTION:
c