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: Some olive trees live to be ____ thousand years old.\Question: Choose the right answer from options given a) ten b) zero c) two d) seven

A: c
****
Q: Copper is ____ times higher in dog liver than in human liver.\Question: Choose the right answer from options given a) three b) ten c) six d) one

A: b
****
Q: Pepper is actually berries that are picked around ____ months after flowering.\Question: Choose the right answer from options given a) three b) nine c) ten d) two

A:
b
****