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: Dunes are of ____ types - linear and parabolic.\Question: Choose the right answer from options given a) three b) four c) ten d) two

SOLUTION: d

PROBLEM: Asthma accounts for ____ in six of all pediatric emergency visits in the United States.\Question: Choose the right answer from options given a) four b) seven c) one d) six

SOLUTION: c

PROBLEM: Identical twins are ____ people.\Question: Choose the right answer from options given a) two b) six c) four d) seven

SOLUTION:
a