How Did Rogers Approach Doing Therapy with an African-American Client

How did Rogers approach doing therapy with an African-American client?

A) He approached him or her just like he did any other client.
B) He was a bit more authoritarian with her or him.
C) He became the client's student in a "course" on African-American experience, before he began his usual procedures.
D) He worked especially hard at understanding him or her, so that, should he fail in gaining an understanding, he could terminate therapy early, thus protecting the client.