I am not sure how to answer your question
Answer:
C
Explanation:
Both B and D use "publish" instead of published which is not on the correct tense, so we can rule those out. Then, I looked for another error, and you need an a before "patent clerk." So A, the other viable answer, was ruled out. C is correct.
Inddonesian hope this helps
C but could possibly be D
Answer:
His speech was given on August 28, 1963, on it was given at Lincoln Memorial in Washington DC & Martin Luther King Jr Day also known as civil rights day, commemorates the birth of Martin Luther King, Jr.
Explanation: