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: Natural tellurium consists of ____ isotopes.\Question: Choose the right answer from options given a) six b) seven c) eight d) one

SOLUTION: c

PROBLEM: Laparoscopic surgery is performed via three or ____ small incisions in the abdomen.\Question: Choose the right answer from options given a) nine b) six c) five d) four

SOLUTION: d

PROBLEM: Bats have ____ strategies for weathering the cold.\Question: Choose the right answer from options given a) zero b) nine c) two d) one

SOLUTION:
c