The answer is A
Cause Elgar described how on the evening of 21 October 1898, after a tiring day's teaching, he sat down at the piano. A melody he played caught the attention of his wife, and he began to improvise variations on it in styles which reflected the character of some of his friends. So it will be A
The altarpiece is made up of gilt bronze and is on view at The Met.
I believe the answer would be C. Floor plan.
I chose this answer because floor plans show you the layout and design of a room/entire floor, and how the space is going to be used.