Shaun and Trudy are selling raffle tickets. So far, Shaun has sold x tickets. Trudy has sold 3 more tickets than half the number of tickets that Shaun sold. Which expression represents the number of raffle tickets that Shaun and Trudy have sold altogether?
A. 1/2x + 3
B. x+3
C. 3/2x + 3
D. 2/2x + 3