Answer:
C) It is often the most challenging part of civil litigation because discovery can be time-consuming and expensive.
Step-by-step explanation:
In a civil case the discovery phase takes place before the trial starts. Both parties try to gather as many facts as they can regarding the case and obtain evidence through the rule of civil procedure. They try to obtain evidence against the other party by the use of interrogatories, depositions, and requests for documents and admissions.
Discovery may be very time consuming and expensive since each party will investigate the other party and no party is going to voluntarily offer information, it must be discovered.