If an Accused Requests Assistance of His or Her Own

If an accused requests assistance of his or her own counsel at a confrontation, how does this impact the process?

A) The confrontation must be delayed until the accused's attorney is present regardless of how long that may take.
B) The confrontation must be delayed until an attorney familiar with the case is present.
C) The confrontation may proceed without delay if the accused's attorney cannot be present in time.
D) The confrontation must be delayed until substitute counsel can be present if the accused's own attorney cannot be present.