Mark loves his weekends. On Saturday mornings, he usually goes to the park to play basketball with his friends. In the afternoons, he sometimes visits his grandparents. On Sunday, he prefers to stay home, read books, or play video games. He never studies on weekends.
Which of the following is TRUE about Mark's weekend activities?
A) He studies on Sunday mornings.
B) He always visits his grandparents on Saturday.
C) He plays basketball with his friends on Saturday.
D) He goes to the park on Sunday afternoons.