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').

[EX Q]: Diploid cultivars have ____ alleles.\Question: Choose the right answer from options given a) eight b) six c) two d) five
[EX A]: c

[EX Q]: Pupae usually transform into adults ____ to three days later.\Question: Choose the right answer from options given a) one b) two c) no d) eight
[EX A]: b

[EX Q]: Healthy adults can live up to ____ years.\Question: Choose the right answer from options given a) ten b) four c) three d) six
[EX A]:
c