Liam is comparing the costs of phone plans at two different companies to determine which plan to buy. Company A charges $50 each month plus an additional $10 per gigabyte of data used. Company B charges $60 each month plus an additional $8 per gigabyte of data used. The following equation represents the cost of the phone plans for the two companies when they are equal, where g represents the amount of gigabytes of data used. Complete each of the statements below with the correct answer choice.

The cost of the phone plans will be the same for company A and company B when
gigabytes of data are used.

If company A changes the cost of data per gigabyte to
, then the two phone plans will never have the same cost.

If company B's initial monthly cost
and the cost of data per gigabyte
, then the cost of the two phone plans will always be the same.