4. A researcher designed a study to investigate CFIs' attitudes in the state of Florida to- ward gender in aviation. She received permission from 15 flight schools to personally contact the CFIs during their weekly briefings. Which would be an appropriate target population?

a. All CFIs who have negative attitudes toward gender in aviation.

b. All CFIs in the world.

c. All CFIs in Florida.

d. All CFIs in the 15 flight schools.