Mrs. Williams wants to determine which year-end celebration to choose for the students. She wants student input, so she needs to choose a sample of 20 students from the school. Which of the samples shown is a random sample? Select two answers.

A.
Choose the first 20 students to arrive in the library in the morning.

B.
Choose the 20 students who volunteer for the school fundraising event this Friday.

C.
Give every student a number and select 20 numbers from a box without looking.

D.
Assign students a number and choose the first 20 numbers to come up using a random number table.

E.
Choose the first 20 students from an alphabetized school roster.