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: Cows have four stomachs, and the first ____ yield merchantable tripe.\Question: Choose the right answer from options given a) two b) five c) zero d) three

SOLUTION: d

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

SOLUTION: c

PROBLEM: Most spiders live only a year or so, molting five or ____ times before reaching maturity.\Question: Choose the right answer from options given a) three b) six c) four d) ten

SOLUTION:
b