Wee-mobile is offering a cell phone family plan for its users. the breakdown of the cost of the plan per month is given below.

subscription fee: $100 (one-time cost)
unlimited data cost: $40 per line per month
unlimited call cost: $10 per line per month
unlimited text message cost: $10 per line per month
cost of phone: $300 per line
the total cost for a 6-month plan for n lines is represented by the expression below.

660n+100

which statement best describes the coefficient of n?

a.
it is the total cost per line for unlimited data, calls, and text messages for 6 months.
b.
it is the total subscription fee for 6 months.
c.
it is the total cost per line for unlimited data, calls, text messages, and one phone for 6 months.
d.
it is total cost of subscription and one phone for 6 months.