The correct answer is both A and B.
A) Muslims allowed others to live in their territory as long as they paid taxes. Under Islamic rule, various religious groups, including Christians, were often permitted to practice their faith in exchange for paying a tax known as the jizya. This policy fostered relative coexistence between different religious communities.
B) The Muslims benefited from the revenue brought by pilgrims. The presence of Christian pilgrims visiting holy sites was a source of economic benefit for Muslim rulers, as they collected taxes and fees from these visitors. This economic incentive contributed to a more tolerant environment, as it was in the Muslims' interest to accommodate Christian pilgrims.
Thus, the combination of these factors contributed to the limited tensions between Muslim and Christian leaders prior to the onset of the Crusades.