Answer:
B and D are correct
Explanation:
A isn't correct because the survey wasn't out of students in the city, it was out of people attending Elan's school.
B is correct because the survey said 28% of students at Elan's school have math first on mondays.
C isn't correct because the survey said the exact opposite.
D is correct because only 15% of students at Elan's school have science first on mondays