Molly Has Generated General Business Credits Over the Years That

Molly has generated general business credits over the years that have not been utilized. The amounts generated and not utilized follow:
In the current year, 2018, her business generates an additional $15,000 general business credit. In 2018, based on her tax liability before credits, she can utilize a general business credit of up to $20,000. After utilizing the carryforwards and the current year credits, how much of the general business credit generated in 2018 is available for future years?

A) $0.
B) $1,000.
C) $14,000.
D) $15,000.
E) None of the above.