What was the purpose of John Wheatley's letter to the publisher of Phillis Wheatley's poems? A. to explain why no one should take the poems too seriously.
B. to explain how Phillis became an accomplished writer
C. to assure the world that Phillis was no longer a slave
D. to give credit for Phillis's accomplishments to his wife and himself

B. to explain how Phillis became an accomplished writer

Explanation:

John Wheatley's letter to the publisher of Phillis Wheatley's poems was to explain how Phillis became an accomplished writer.

His letter was descriptive of how far Phillis had come as a writer, how she learned English, a foreign language, and how she became proficient in writing at such a short time.

Below is an excerpt of the letter:

"...without any assistance from school education, and by only what she was taught in the family, she, in eighteen months’ time from her arrival, attained the English language, to which she was an utter stranger before, to such a degree as to read any..."