Two circles touch each other externally at P. AB is a direct common tangent to the two circles, A and B are points of contact, and $$\angle PAB = 40^{circ}$$. The measure of $$\angle$$ ABP is:

A

$$45^{\circ}$$

B

$$55^{\circ}$$

C

$$50^{\circ}$$

D

$$40^{\circ}$$