To know weather to play sharp flat or minor vs major
I want to say B. C. and D.
Aldrich Hitchcock was considered one of the best English director. He has a technique in getting people's attention through the visual effects of his films where some of it are optical effects and others are mechanical effects.The sound and visual techniques require less attention like his film entitled "Blackmail".
Aside from being a director, he is also a producer and he popularized McGuffin technique.
It's probably way things are made or the way the structure is
D. ABCD is the correct representation of the Rondo Form. I hope this helped you. Please give brainliest. :)