You Own American Sniper on DVD

Multiple Choice

You own American Sniper on DVD. The opportunity cost of watching this DVD for the fourth time

A) is zero, since you own it.
B) is one-fourth the cost of the DVD, as this is the fourth time you have watched it.
C) is the value of the alternative use of the time you spend watching the DVD.
D) must be the same as the opportunity cost of watching it the first time.