Xiao Zhang bought a brand refrigerator on the recommendation of a friend. What is his source of information?

Xiao Zhang bought a brand refrigerator on the recommendation of a friend. His source

Xiao Zhang bought a brand refrigerator on the recommendation of a friend. His source of information is ().

A. Personal sources

B. Commercial sources

C. Public sources

D. Sources of experience

Check the answers and analyze the correct answers: A.