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').

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

Parliaments can last five years, often last ____ and a bit.\Question: Choose the right answer from options given a) four b) three c) five d) two
a

Chitons are primitive mollusks with ____ shells held together by a fleshy girdle.\Question: Choose the right answer from options given a) ten b) eight c) seven d) five

b