Answer: The answer is A.
Step-by-step explanation: The population of interest is defined as the population that you are drawing an inference (or conclusion) about. Usually, you cannot obtain the data for the whole population of interest, rather you can only obtain data for a proportion of it and then make inference about the whole population.
In this question, we can see that the researcher considers the population of interest to be "students last semester at FIU", therefore, A is the best answer. Option B and D are too broad, while option C refers to the sample, not population of interest, of the study.
