The average of 16 numbers is 43. The average of the first 7 numbers is 45 and the average of the next 6 numbers is 52. If the $$14^{th}$$ number is 11 less than the $$15^{th}$$ number and is 5 more than the $$16^{th}$$ number, then the average of the $$15^{th}$$ and $$16^{th}$$ number is:

A

48.5

B

48

C

47.5

D

49