​If movie theatres decided to increase the price for the movie tickets,holding other factors constant,what would happen to the demand for popcorn in the theatres?

A) ​the demand for popcorn would shift to the left because popcorn and movies are substitute goods.
B) the demand for popcorn would shift to the left because popcorn and movies are complementary goods.
C) the demand for popcorn would shift to the right because popcorn and movies are substitute goods.
D) ​the demand for popcorn would shift to the right because popcorn and movies are complementary goods.

An engineering change notice is used to change a(n)

A) MRP.
B) MPS.
C) ERP.
D) BOM.
E) DRP.