Mark Owns a 24-Hour Convenience Store

Multiple Choice

Mark owns a 24-hour convenience store. Lately he has noticed that the liquor inventory purchases have gone up by huge amounts, although sales proceeds from this category haven't increased. He suspects his two night-shift employees. Which is the best investigative method to uncover such a fraud?

A) Electronic investigation
B) Conversion investigation
C) Inquiry investigation
D) Concealment investigation