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:
Reservoirs cover an area of the planet ____ times the size of Britain.\Question: Choose the right answer from options given a) two b) eight c) three d) six

Ex Output:
d


Ex Input:
Black people are four to ____ times more likely to be stopped and searched.\Question: Choose the right answer from options given a) three b) five c) one d) four

Ex Output:
b


Ex Input:
Insects have antennae, three body parts and ____ legs.\Question: Choose the right answer from options given a) six b) nine c) four d) seven

Ex Output:

a