The most appropriate of the homonyms to complete the sentence below is; Choice B; course- to run, race or move swiftly.
<h3>Which homonym best completes the sentence?</h3>
From the task content, the sentence given is;
John started to relax as all the encouraging words his mother spoke the previous day began to........ through his mind.
In essence, to complete the sentence, the blank should be filled with run. On this note, it follows that the homonym which is most appropriate is; Choice B.
Read more on homonyms;
brainly.com/question/4532169
#SPJ1