After Muhammad's death, a new leader, called a caliph, was chosen. Caliph means__ A.) ruler
B.) successor
C.) king
D.) priest​

Explanation:

After Muhammad's death, a new leader, called a caliph, was chosen. Caliph means successor.

Caliph, Arabic khalīfah (“successor”), in Islamic history the ruler of the Muslim community.

Explanation:

nuclear fission produces the atomic bomb, a weapon of mass destruction that uses power released by the splitting of atomic nuclei the fighting in iwo jima and okinawa affected the allies' pacific strategy because truman decided to drop the atomic bomb on mainland japan.

that would be the steamboat because none of the other things are forms of transportation