Which of the following samples suffers from convenience sampling?

A. Sampling 5 students from a class by asking which students want to go to an afterschool meeting about the upcoming dance.

B. Sampling all students from each grade level and asking them how much time they spend an extracurricular activities.

C. Sampling 50 students at random from a list of all 2,000 students at the school and asking them the average about the time they
spend on homework each night.

D. Od Sampling the first 100 students to arrive at the cafeteria for lunch and asking them if they like the food served at the cafeteria.