A computer company produced this graph to show how many computers it expects to sell based on how much the company spends on internet advertising the company expects to sell 40 million computers spending 5 million on internet advertising which set of units and scales are appropriate for the two axes

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