You will be given a definition of a task first, then some input of the task.
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').

Clustering takes many forms, and can scale from ____ computers.\Question: Choose the right answer from options given a) one b) zero c) two d) seven
Output:
c