The separation between muslims of central asia and those in the arabian center of islam grew wider when authoritarian leaders took control of central asia fundamentalism arose in central asia soviets left central asia soviets took control of central asia

Soviets took control of Central Asia

Explanation:

The Muslims of Central Asia and the Muslims from the Arab world, apart from the period when the Islam spread among the people of Central Asia, have never really been in the best of relations. The problem has not been religious, as the religion is the same, and it is the same branch of it, but it is more the traditional hostility between the Turkic people and the Arab people.

Apart from the long lasting tensions and numerous conflicts between the Turkic peoples and the Arabs, when the Soviets took control over Central Asia the gap grew even more. The Soviets implemented communism, while the religion was either forbidden for practicing or largely restricted to practicing in home conditions. Over time, this changes the manner in which the Islam is practiced in Central Asia, in the sense of being much more liberal Muslims, unlike the ones from the Arab world.

b. niger

explanation:

the only other powers were germany russia and uk and they were too busy fighting each other wearing each other down   that the us was becoming strong and they were becoming weaker