Barge Company and Cove Harbor dispute the meaning of their contract. Unable to agree on settlement, the parties prepare for trial. To obtain information, they engage in discovery. This includes gaining access to each other's witnesses and other types of evidence by

a$.$ improper requests and related tactics.

b$.$ subterfuge and similar methods.

c$.$ voir dire and a writ of certiorari.

d$.$ depositions and other devices.