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').

Piglets normally grow about half their potential growth rate from birth to ____ weeks of age.\Question: Choose the right answer from options given a) zero b) no c) five d) three
d

Young children suffer from an average of six to ____ colds a year.\Question: Choose the right answer from options given a) ten b) eight c) two d) one
b

Adolescents get colds about ____ to four times a year.\Question: Choose the right answer from options given a) ten b) nine c) four d) two

d