What does the Hijra symbolize in Islam and what did it start?

Question

A.It means "migration and marks the beginning of the Muslim era

B.it means "prophesize" and marks the beginning of the sunnah tradition

C.it means "sacred" and marks the beginning of worshipping in mosques

D.it means "divide" and marks the beginning of the Sunni Shia split

Answer 1

A. It means "migration and marks the beginning of the Muslim era