In the AD Partnership, Allen's Capital Is $140,000 and Daniel's

In the AD partnership, Allen's capital is $140,000 and Daniel's is $40,000 and they share income in a 3:1 ratio, respectively. They decide to admit David to the partnership. Each of the following question is independent of the others.
Refer to the information provided above. What amount will David have to invest to give him one-fifth percent interest in the capital of the partnership if no goodwill or bonus is recorded?

A) $60,000
B) $36,000
C) $50,000
D) $45,000