The graph of current gain versus collector current indicates that the current gain A. varies enormously B. is contant C. varies slightly D. equals the collector current divided by the base current E. None of the above

The correct answer is: C. varies slightly.

The graph of current gain versus collector current shows that the current gain is not constant, but varies slightly with collector current. This is because the transistor is a nonlinear device, and its characteristics change with operating conditions.

Option A is incorrect because the current gain does not vary enormously. Option B is incorrect because the current gain is not constant. Option D is incorrect because the current gain is not equal to the collector current divided by the base current. Option E is incorrect because the current gain does vary slightly.