Answer:
Option b.
Explanation:
Statement b would be true in this case.
Let's gather data from the question:
student council = seniors + juniors
Now, some few things to note:
1. Senior students are in their 12th grade. This is the senior year in high school.
2. The sophomore is the 10th year in school. These are not senior year students.
Isolating the students, the sophomore + junior students are likely to be the majority here.
Some junior and sophomore students voted for the proposal so it means that the combined number will be: all senior students + some juniors + some sophomores.
Therefore, the majority of the freshmen and a majority of the sophomores voted for the proposal.