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: Most bioluminescence is blue for ____ reasons.\Question: Choose the right answer from options given a) seven b) two c) four d) zero

SOLUTION: b

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: Glycolysis is a ten-step pathway, involving ____ enzymes.\Question: Choose the right answer from options given a) one b) no c) eight d) ten

SOLUTION:
d