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: Routers are basically systems, which connect ____ networks together.\Question: Choose the right answer from options given a) three b) two c) nine d) six

SOLUTION: b

PROBLEM: Indian reservations are part of five of the nation's ____ poorest counties.\Question: Choose the right answer from options given a) seven b) nine c) ten d) two

SOLUTION: c

PROBLEM: All plants take two generations to complete ____ life cycle.\Question: Choose the right answer from options given a) ten b) zero c) nine d) one

SOLUTION:
d