The Roman Emperor, Constantine
The Roman Emperor conversion to Christianity helped to make it acceptable in Rome. As a result, Christianity played a big role in the unification of Rome as a single Christian society as the Christian church and faith grew
I believe the answer is D. MlK was fatally shot while standing on his hotel patio after giving a speech.
It's a very long sentence with a lot of information, but it is still only a simple sentence (option b): it has only one verb (taught). In order to qualify as a complex or compound-complex sentence, it would have to have at least 2 phrases, each with a different verb.
