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').

[EX Q]: Couples often date from one to ____ years before getting engaged.\Question: Choose the right answer from options given a) three b) nine c) eight d) seven
[EX A]: a

[EX Q]: Foresters usually work ____ hours a day, five days a week.\Question: Choose the right answer from options given a) six b) five c) seven d) eight
[EX A]: d

[EX Q]: Substance abuse knows ____ boundaries crossing all cultural, ethnic, and socioeconomic lines.\Question: Choose the right answer from options given a) eight b) six c) no d) ten
[EX A]:
c