Based on a book or not, I will say the answer is A because the water is most likely suitable for drinking and it will allow them to not travel as far as they used to to have obtained water.
Most Berbers (native people of North Africa) were converted to Islam.
The spread of Islam was first into the Arabian Peninsula, then into Asia Minor (currently Turkey) and North Africa. Berbers were the one of the first races who met Islam.
The Holy Land was Jerusalem.
The Crusades were a series of 8 wars fought for dominance over Jerusalem.
Causes:
1. The Byzantine Emperor needed help against invaders.
2. Retake Jerusalem.
3. Conquer more land.
