Which of these was a precedent that George Washington set?

Question

constitutional amendment process
formal presidential dinners******
Singing of the national anthem
use of a presidential cabinet

Answer 1

nope:

http://www.dummies.com/how-to/content/what-is-the-presidents-cabinet.html

Answer 2

So is it D?

Answer 3

Ms. Sue, is the correct answer D?

Answer 4

Yes, D.

Answer 5

Thanks so much.