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').

[EX Q]: 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
[EX A]: a

[EX Q]: Baby elephants are usually dependent on mother s milk for at least ____ years.\Question: Choose the right answer from options given a) six b) three c) two d) seven
[EX A]: b

[EX Q]: Bilingualism involves the ability to use ____ different languages successfully.\Question: Choose the right answer from options given a) three b) two c) zero d) four
[EX A]:
b