In order to avoid leaving their fingerprints as evidence, the robbers wore gloves

A. The robbers wore gloves in order that his fingerprints would be taken as evidence.

B. His fingerprints would not be left as evidence unless the robbers wore gloves. 

C. In order to leave some fingerprints as evidence the robbers took off his gloves.

D. The robbers wore gloves so that he would not leave any fingerprints as evidence.