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').

Nightmares happen frequently in childhood, especially between the ages of ____ and six.\Question: Choose the right answer from options given a) three b) eight c) no d) ten
a

Ants have ____ distinct body parts.\Question: Choose the right answer from options given a) nine b) zero c) no d) three
d

Snakes have ____ layers of skin.\Question: Choose the right answer from options given a) three b) eight c) zero d) seven

a