How many actors were there in the first Greek plays?

Question

a) 1

b) 12

c) 100

d) No set number

Answer 1

Weren't they all actors?

Answer 2

If they mean Thespis's plays one actor and a chorus.  If they mean Aeschylus's plays. 2 actors and a chorus.  so I choose a.

Answer 3

i choose d! no set number