14 persons can complete $$\frac{5}{12}$$ part of a work in 18 days, working 7 hours daily. How many hours working daily will 21 persons complete the rest of the work in 15 days?

A

$$7\frac{21}{25}$$ hours

B

$$3\frac{21}{25}$$ hours

C

$$11\frac{3}{25}$$ hours

D

$$9\frac{16}{25}$$ hours