I'm 2,000 years old in the city of Pompeii. I was once baked and tasty. Back in 79 A.D., the ash and rocks from Mount Vesuvius covered me and protected me from air and decomposers. I was found in the bakery oven when people dug up the town.
What am I?
A. Cake
B. Bread
C. Cookies
D. Casserole