Answer:
b. conducting a survey of how frequently people exercise
Explanation:
In research methods, the "quantitative research method" is described as a phenomenon that significantly involves objective measurement and the numerical, statistical, or mathematical analysis of the data being collected by the investigator or the researcher via surveys, polls, and questionnaires and therefore by manipulating the already existing "statistical data" through various computational techniques.
There are four distinct types of quantitative research methods including correlational, experimental, descriptive, and quasi-experimental research.