Which of the following activities are examples of data gathering?
check all that apply.
a. finding the mean weight of heart-disease patients in a study
b. measuring the dch (diameter chest-high) of 200 trees in a forest
c. counting the votes in an election to determine the next mayor
d. asking 500 telephone respondents what their favorite radio station is
e. making a pie chart showing the kinds of cars owned by people in a sample of 1000

I am rpetty sure that the the following activities which are examples of data gathering are being revealed by option : A. Finding the mean weight of heart-disease patients in a study ,B. Measuring the DCH (diameter chest-high) of 200 trees in a forest and E. Making a pie chart showing the kinds of cars owned by people in a sample of 1000 because there you can clearly see the thst you are gathering data while the rest of option contain already gathered info.