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: Embrasures have ____ functions.\Question: Choose the right answer from options given a) three b) seven c) zero d) nine

SOLUTION: a

PROBLEM: Unequal cleavage can occur in ____ ways.\Question: Choose the right answer from options given a) two b) seven c) three d) ten

SOLUTION: a

PROBLEM: Black widows mature in two to ____ months.\Question: Choose the right answer from options given a) seven b) three c) two d) four

SOLUTION:
d