听力原文：Man: Most actors start out with a bit of a regional or non-standard accent of some sort, but what tends to happen is that, at drama school, part of the training is to acquire what's called 'standard English'. So you lose your original accent and when somebody says, you know, 'Do something in your old voice', it takes a couple of minutes to click in and get your head round it again. I phone my parents and they say, 'My, you sound so English', but then over here, I sometimes don't get work because people can hear that I'm actually Australian, so I've got a bit more work to do there.
You hear an actor talking about using different accents in his work. What point is he making about actors？

A. They need to study a wide variety of accents.
B. They have to be able to control their use of accents.
C. They should try to keep their original accents,