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 Input:
Interpersonal conflict exists whenever ____ or more people disagree.\Question: Choose the right answer from options given a) five b) seven c) no d) two

Ex Output:
d


Ex Input:
Parapsychologists have ____ basic approaches to their subject matter.\Question: Choose the right answer from options given a) three b) two c) ten d) five

Ex Output:
b


Ex Input:
Enzymes often catalyze reactions with two substrates and ____ products.\Question: Choose the right answer from options given a) seven b) five c) zero d) two

Ex Output:

d