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').

Q: Female cats have ____ X's in each cell.\Question: Choose the right answer from options given a) five b) two c) one d) ten

A: b
****
Q: Hybridization is the practice of ____ different species interbreeding.\Question: Choose the right answer from options given a) no b) one c) two d) three

A: c
****
Q: Hoppers begin egg laying one to ____ weeks after reaching the adult stage.\Question: Choose the right answer from options given a) three b) nine c) six d) four

A:
a
****