Answer:
people who bought automobiles
Explanation:
Market research can be defined as a strategic technique which typically involves the process of identifying, acquiring and analyzing informations about a business. It involves the use of product test, surveys, questionnaire, focus groups, interviews, etc.
Cyrus H. K. Curtis was a publisher that founded and established the Curtis Publishing Company as a news magazine in 1891.
The Curtis Publishing Company's early marketing research efforts mainly had to do with people who bought automobiles in the United States of America.
