Within Seconds Following a Posterior Superior Alveolar Injection, a Client's

Within seconds following a posterior superior alveolar injection, a client's face becomes distended and swollen on the injected side. The appropriate action by the hygienist would be to:

A) Have the dentist administer an antihistamine
B) Have the dentist administer an antibiotic
C) Have the dentist incise and drain
D) Counsel the client, apply pressure to the site, and ice to the area
E) Ask the client to exhale