Answer:
The correct answer is china
Answer:
Correct answer is A. Islamic calendar.
Explanation:
A is correct as this answer known as Hijra happened in 622. This year marks the period from when the Muslims started counting time.
B is not correct as Medieval period starts with the fall of Western Roman Empire.
C and D are not correct as this don't refer to the Muhammed's move from Mecca to Medina.
Gulf coastal plain is the plain that extends along the gulf
<span>River valleys
this was ask a week ago but I hope I helped someone :')</span>
