Why did OJ Simpson's deposition and in-court testimony in the civil case not constitute a violation of his right against self-incrimination?

A. he protection against self-incrimination only applies in criminal cases

B. he knew he was innocent and he had nothing to hide

C. his lawyer advised him he would look guilty if he refused to be deposed or to testify

D. he waived his right against self-incrimination and agreed to testify anyway

E. the protection against double jeopardy allowed Simpson to testify in the civil case