3. what method of data collection could be used to determine how many countries students have visited?\na…

Brief Explanations:

To determine how many countries students have visited, a survey would be the most appropriate data - collection method. In a survey, students can directly report the number of countries they have visited. Observation and measurement are not suitable as they cannot directly gather this self - reported information. An experiment is also not relevant as it involves manipulating variables, which is not needed here.

Answer:

b. Survey