Which of These Is NOT an Example of Opportunity Cost

Multiple Choice

Which of these is NOT an example of opportunity cost?

A) Lobster catchers in Point Judith,Rhode Island continued to trap lobsters at the cost of depleting the lobster population.
B) President George W.Bush's administration has pushed for oil exploration in the Arctic National Wildlife Refuge in Alaska at the cost of environmental preservation.
C) Lobster catchers in Port Lincoln,Australia paid a licensing fee for the right to own lobster traps.
D) The "bridge to nowhere" to be built near Anchorage,Alaska comes at the cost of adding to the federal budget deficit.