Talia’s gym membership costs her $75 per month plus an additional $30 for each month that she chooses to bring a guest. Which equation can be used to find the number of months Talia brings a guest if she spends $990 on a year-long membership?
Group of answer choices
A. 990 = 75(12) + 30(12 − n)
B. 990 = 75(12) − 30n
C. 990 = 75n + 30(12)
D. 990 = 75(12) + 30n