In which sentences are the underlined terms written properly?

choose all answers that are correct.

1. william of normandy crossed the english channel and defeated king harold ii in a. d. 1066.

2. julus caesar was assassinated in b. c. 44.

3. romulus augustulus, the last roman emperor, was taken prisoner by the german king odovacar in a. d. 476, or c. e. 476.

4. alexander the great died in 323 b. c., or 323 b. c.e.