Wolodko Engineering Inc Sued Dhaliwal Ltd for the Tort of Negligence

Wolodko Engineering Inc sued Dhaliwal Ltd for the tort of negligence. At one point during the litigation process, an examination- in- chief occurred. That means that

A) the case must have been heard by at least one appellate court.
B) the judge asked one of the parties a direct question.
C) questions were answered under oath.
D) one of the parties hired an expert witness to conduct a scientific investigation on a piece of physical evidence.
E) one of the parties asked the other party's witness a question during examination for discovery.