Benny is writing a research paper on a specific method of farming. He really admires the methods used by one farmer, who is a published author, and wants to use his explanations in his research paper. How can Benny ensure he doesn´t plagiarize?

A. Use the farmer´s explanation verbatim in his paper
B. Rephrase the farmer´s explanation in his paper
C. Change a few words in the farmer´s explanation in his paper
D. Add a formal citation and use the farmer´s explanation in his paper