Veronica wanted to know how many students in the sophomore class at her school learned a language other than English as their first language. There were 450 sophomores in the sophomore class, too many for Veronica to question each of them, so she prepared 50 questionnaires to distribute to some of the students in the class.

Which of the following are independent events? a) knowing that it is going to rain tomorrow, and bringing an umbrella to schoolb) knowing that you have to get up early tomorrow, and going to bed before 9 p.mc) knowing that it is going to rain tomorrow, and going to bed before 9 p.md) knowing that you have a test in school tomorrow, and studying thw night before