Jackie is setting up chairs in the gymnasium for a magic show. she needs to have seats for 78 students and 3 teachers. she has to have 12 chairs in a row. how many rows will there be? how many seats will be empty?

a.
6 rows and 9 people will stand
b.
10 rows and no seats will be empty
c.
7 rows and 3 seats will be empty
d.
7 rows and 13 seats will be empty