Candice earns $85,000 working as an administrative assistant in a public company based in New York. The company provides a matching contribution in the 401(k) plan of 50% up to a maximum contribution of 4% of compensation. Her 401(k) plan account had $20,000 in it at the beginning of the year. She contributed $5,000 to the plan this year and the employer made the matching contribution before year end. The ending balance of the account is $30,000. What is her savings rate this year?

a: 468.8%,

b. 9.9%.

c. 12.5%.

d. 25%.