What impact did Constantine I have on the Byzantine empire? A. He split from Rome, causing Rome's fall.
B. He legalized Christianíty and changed the capital.
C. He was part of a council of four rulers, making his rule ineffective.
D. He overthrew the prior emperor.

Correct answer is B. He legalized Christianity and changed the capital.

Explanation:

Option B is correct because he legalized Christianity with the Edict of Milan in 313 and also created new capital, named Constantinople after him.

A is not correct as he didn't split with Rome, he strengthen the Empire.

C is not correct as he changed the system and ruled as a sole ruler.

D is not correct as he was a part of the council of four, but decided the full authority in the country after defeating Licinius.

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