Read the following context and choose the best option to answer the question.
Context: But first I had to trim away some of the shrubs growing up around the window frames . I trimmed other brush , too , because I was out in the yard working , anyway . Foul white flies and other winged pests flew up around me as I worked . I found a nest yellow - jackets in a hole by the apple tree , and killed them .
Question: How may they have killed the yellow jackets ?
Options: 
A. They used a machine gun to spray them with lead .
B. They used a fly swatter to scare them all away .
C. None of the above choices .
D. They used their hands to squish them till they died .


C