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').

Example Input: Basting is the stitching used to hold the ____ layers of fabric together while quilting.\Question: Choose the right answer from options given a) four b) six c) three d) ten
Example Output: c

Example Input: Most spiders have ____ eyes, some only six and several have fewer or none.\Question: Choose the right answer from options given a) ten b) two c) eight d) no
Example Output: c

Example Input: Some English verbs have ____ objects.\Question: Choose the right answer from options given a) four b) three c) zero d) two
Example Output:
d