The Time Spent Researching the Quality and Reliability of DVD

The time spent researching the quality and reliability of DVD players

A) is not part of the total cost of a DVD player.
B) has risen due to the Internet,and hence the total cost of purchasing a DVD player has also risen.
C) has not been affected by the Internet.
D) has fallen due to the Internet,and hence the total cost of purchasing a DVD player has also fallen.
E) is only a cost if you do not purchase a DVD player.