these are Multiple Choice questions, please help ASAP.

1.Private automobile license plates contain three letters followed by three numbers. One example is CCG550. If there are no other constraints, the number of plates that could be manufactured is

A) 150000

B) 17576000

C) 12626000

D) 11232000

2. There are 8 photographs of wildlife to be hung in a display area. The area only has room for 6 photographs at a time. How many different combinations of the photographs are possible?

A) 40320

B) 20160

C) 6720

D) 720