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: Pups remain in the den for about ____ weeks, and are cared for by the entire pack.\Question: Choose the right answer from options given a) ten b) three c) six d) no

SOLUTION: c

PROBLEM: Lions have ____ distinct vocalizations including roars, grunts and growls.\Question: Choose the right answer from options given a) eight b) six c) four d) nine

SOLUTION: d

PROBLEM: Idle land refers to land with undisturbed profiles for at least a period of ____ consecutive years.\Question: Choose the right answer from options given a) three b) ten c) eight d) six

SOLUTION:
a