Which if the following is true about discovery in civil cases?:

Group of answer choices

Discovery does little to facilitate the parties' understanding of the merits of their positions and to prevent surprises at trial

Parties must select just one form of discovery to use in a case, namely $-$ depositions $($where a person must answer questions orally under oath$)$; interrogatories $($where a party must answer written questions in writing$)$; or requests for production of documents $($where a party must turn over requested documents; provided, however, that a party can obtain from the judge a protective order limiting access to confidential or trade$-$secret information$)$

Parties must respond to reasonable discovery even though it can be time consuming and expensive and can require that a party reveal confidential information

The plaintiff must reveal to the defendant information that the plaintiff uncovers and that might aid the defendant's case, even if the defendant didn't specifically request the information from the plaintiff in discovery