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 Input:
Fawns weigh about ____ to nine pounds at birth.\Question: Choose the right answer from options given a) five b) ten c) nine d) six

Ex Output:
d

Ex Input:
Carnations grow well in a garden spot that receive ____ to five hours of sunlight per day.\Question: Choose the right answer from options given a) eight b) three c) one d) four

Ex Output:
d

Ex Input:
Telescopes come in ____ basic types - refractors and reflectors.\Question: Choose the right answer from options given a) five b) ten c) one d) two

Ex Output:
d