Hi,
Here are the answers for the multi's. Ask me if you want any clarification.
1: A
2: B
3: D
4: B
5: C
6: C
7: B
8: C
9: D
10: A
11: D
12: B
13: D
14: A
15: A
16: C
17: D
18: A
19: B
20: C
I'm almost certain these are all correct, but obviously open to any well explained corrections.