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').
--------
Question: Unequal cleavage can occur in ____ ways.\Question: Choose the right answer from options given a) two b) seven c) three d) ten

Answer: a


Question: Aridity presents ____ main obstacles to solitary behavior.\Question: Choose the right answer from options given a) no b) three c) two d) five

Answer: c


Question: Many children know their full names, addresses, telephone numbers, and ages by ____ years of age.\Question: Choose the right answer from options given a) six b) two c) five d) no

Answer:
a