Line P has a positive slope and a positive y-intercept. Line Q also has a positive slope and a positive y-intercept. The two slopes and the two y-intercepts are four different numbers, none equal. Lines P & Q have a single intersection point --- what is the full set of possible quadrants in which the intersection point could be?

A:I only

B:I & III only

C:I & II only

D:I & II & III only

E:all four quadrants possible