Nature of Science (SC.912.N.1.1)

A farmer is trying to determine why some weeds sprayed with weed killer do not die. To begin a scientific investigation of this issue, what would be the first step for the farmer?
A. Analyze the data collected from the experiment.
B. Research what others have already found.
C. Draw conclusions about the plants in his field.
D. Begin an experiment with a control group.

B. Research what others have already found.