Students at a major university must go through several registration steps. officials have observed that it is typically the case that the waiting line at the fee-paying station is the longest. This would seem to suggest that the fee-paying station is the in the student registration process.

BOTTLENECK.

Explanation: Bottleneck in this context refers to the part of a process that is too slow or cumbersome.

Several registration steps can be said to be a process. In a process, any stage or part that is too slow or makes it limited is referred to as bottleneck which is the fee-paying station that is characterized by very long queue.

i believe that the answer to the question provided above is that the role of campaign committees is to act as a bridge between state and local campaigns.