Interesting problem, Buhari. Out of curiosity, if you were to do this "in person," wouldn't you have the same problem? I am far from an expert on this, but it seems that you might need some kind of custom code.
Quiz
Force student to answer specific Questions out of many essay questions in a Quiz
Гэтае абмеркаваньне было заблакавана, таму вы болей ня можаце адказваць на яго.