Final Answer:
The statement that best defines the term restorationism is a) The zeal and fervor of the early church would be restored in the last days.
Step-by-step explanation:
Restorationism, in a religious context, refers to the belief or movement that seeks to restore certain elements or practices of the early Christian church. Option A aligns with this concept by emphasizing the restoration of the zeal and fervor present in the early Christian church, particularly in the last days. This perspective often involves a desire to return to the purity and enthusiasm of the original Christian teachings and practices. While the other options touch on aspects of restoration, option A most accurately captures the essence of restorationism by focusing on the revival of the early church's spirit and devotion.
Option A is the answer.