Detailed Instructions: 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:Upper canines are long and well-developed, and the molars have ____ or four cusps.\Question: Choose the right answer from options given a) nine b) four c) three d) one
Solution:
c