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').

Parallel transfer is the simultaneous transmission of the ____ bit-voltages that constitute a byte.\Question: Choose the right answer from options given a) five b) zero c) eight d) ten
Output:
c