A patient seeks help for recurrent palatal pain. She presents with multiple punctate ulcers in the hard palate that were preceded by tiny blisters. Her lesions typically heal in about 2 weeks and reappear during stressful times. She has:

a. Aphthous ulcers
b. Recurrent primary herpes
c. Recurrent secondary herpes
d. Erythema multiforme
e. Discoid lupus

C