Fast a title that muslims use for the highest leader of islam

The answer is "Caliph"

Explanation: A person considered a political-religious successor to the Islamic prophet Muhammad and a leader of the entire ummah (Muslim community).referring to humans as God’s stewards or vice-regents on earth, the term did not denote a distinct political or religious institution during the lifetime of the Prophet Muhammad. It began to acquire its later meaning and to take shape as an institution after Muhammad’s death.

d - failures.

the only attempted british colony in north america before 1600 was roanoke, virginia, which was a total failure. england claimed several areas, including newfoundland, but made no sustainable attempts to colonize them before 1600.

answer; obscene;