TASK DEFINITION: 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').
PROBLEM: Ostriches have ____ stomachs.\Question: Choose the right answer from options given a) four b) nine c) eight d) three

SOLUTION: d

PROBLEM: Organisms have ____ forms of nucleic acid.\Question: Choose the right answer from options given a) four b) three c) two d) one

SOLUTION: c

PROBLEM: Spores have ____ combinations of sexes.\Question: Choose the right answer from options given a) four b) five c) seven d) three

SOLUTION:
a