Refer to the Following Paragraph to Answer the Questions Below

Multiple Choice

Refer to the following paragraph to answer the questions below.
Professor Howlick is studying incoming freshmen) student drinking behavior at Boozemen State University in Boozemen, Kansas. Every incoming freshman is required to have a university email address. After obtaining a list of all incoming freshmen students email addresses, he numbered every email address from 1 to 4,000. Using a random-number table, he obtained a sample of 200 freshman email addresses. He then emailed students requesting them to take an online survey. He also had two follow-up email reminders. A total of 180 students took the online survey.
-What is Howlick's sampling frame?

A) incoming freshmen telephone numbers
B) the drinking behavior of students
C) student freshmen email addresses
D) Boozemen State University