A change in the price of DVDs will change the demand for DVD

A change in the price of DVDs will change the demand for

DVDs.

DVD players.

Theater movies.

B & C

Solution

Option (D): Both (B) & (C) are correct.

DVD and DVD players are complementary goods. A change in price of DVD will change the demand for DVD players, shifting the demand curve of DVD players (but there will be a movement along the demand curve for DVD).

Also, DVD and theater movies are substitutes. As DVD price changes, demand for theater movies also changes.