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').

Input: Consider Input: Cows can be up to ____ times more active than normal while in heat.\Question: Choose the right answer from options given a) eight b) nine c) two d) six

Output: a


Input: Consider Input: Southern moles are six to ____ inches long and weigh three to four ounces.\Question: Choose the right answer from options given a) zero b) nine c) five d) seven

Output: d


Input: Consider Input: Dragonflies have ____ sets of paired, transparent wings.\Question: Choose the right answer from options given a) eight b) zero c) seven d) two


Output: d