Answer:
720
Step-by-step explanation:
becasue there are 6 questions, and 4 possible answes for each
there are 24 diffrent answers if u just choose everything once, like a a a a a a for each, but then u have to do a a a a a b and a a a a a c etc.
so u do 6*5*4*3*2*1
permunatation