Respuesta :
A piece of evidence as seen in this passage is:
- Both of these.
What is evidence?
Evidence is referred to something/statement which actually proves a point or fact. Evidence helps one to understand the subject matter as a result of what has proven it valid.
From the question, we can clearly see that an author was quoted in options A and D. These options actually present an evidence.
Learn more about evidence on https://brainly.com/question/8407102