3 Students responded to a survey. The survey asked students to report the amount of time they spent doing homework during a week, to the nearest hour. This histogram displays the data. Which of these statements must be true? students 10 81315 7 65 5 4 3- 2 1 5 tp Date OPEN UP RESOURCES 6-8 A. A total of 4 students participated in the survey. 20 10 12 15 homework time in hours B. Every student spent at least 1 hour doing homework. C. Every student spent less than 20 hours doing homework. D. More students spent 7 hours doing homework than spent 12 hours