In a soccer league with 6 teams (P,Q,R,S,T,W), each team must eventually play each other team exactly once. So far, P has played one match, Q has played 2 matches, R has played 3 matches, S has played 4 matches, and T has played 5 matches. How many matches has W played so far?
Answer Choices
A. 1
B. 2
C. 3
D. 4
E. 5