In the Market for Pharmaceuticals, the Issue of "Drug Lag

In the market for pharmaceuticals, the issue of "drug lag" illustrates which of the following ideas?

A) The longer a drug is tested for safety, the lower the opportunity cost in terms of lives lost.
B) If a drug is not tested for safety, it might kill more people.
C) Because of the higher the cost of testing a drug, it takes longer to make it, and more lives are lost.
D) Lives are being lost because safe drugs that are still in the testing stage have not yet been approved.