Why did Ottoman sultans create the Janissary?

The organization became an important Ottoman military force soon after it was established because the Janissaries were perceived to be the sultan's most trustworthy soldiers as well as disciplined troops with particular small arms skill

yes based on alexanders actions he deserved the title of "the great". his empire covered about 3,000 miles and he was able to establish the empire over a 13 year period of time. he was able to conquer many different places. he also defeated the persians. he conquered egypt and developed a city and named it after himself.

the answer would be c