Molly has generated general business credits over the years that have not been utilized. The amounts generated and not utilized follow:

2014

$2,500

2015

7,500

2016

5,000

2017

4,000

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.