Which of the following is true about logging ground instruction?
A. Each aeronautical knowledge area must be logged as a separate training event.
B. Individual knowledge areas need not be listed, e.g. "Ground training per 61.105(b)" will cover all required knowledge areas.
C. Multiple knowledge areas may be listed under one training event, but they must be listed explicitly, e.g. "Ground training per 61.105(b)(1, 2, 3)."