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: Conglomerate integration is when ____ apparently unconnected companies merge.\Question: Choose the right answer from options given a) two b) six c) no d) three

Output: a


Input: Consider Input: Sugar beet is strongly self-sterile setting few or ____ seeds under strict isolation.\Question: Choose the right answer from options given a) three b) no c) five d) nine

Output: b


Input: Consider Input: Redness persists for an unpredictable length of time, varying from three weeks to ____ months.\Question: Choose the right answer from options given a) seven b) four c) two d) five


Output: b