What are the names of the four caliphs in Islam?

Rashidun, (Arabic: “Rightly Guided,” or “Perfect”), the first four caliphs of the Islamic community, known in Muslim history as the orthodox or patriarchal caliphs: Abū Bakr (reigned 632–634), ʿUmar (reigned 634–644), ʿUthmān (reigned 644–656), and ʿAlī (reigned 656–661)

Explanation:

Rashidun, (Arabic: “Rightly Guided,” or “Perfect”), the first four caliphs of the Islamic community, known in Muslim history as the orthodox or patriarchal caliphs: Abū Bakr (reigned 632–634), ʿUmar (reigned 634–644), ʿUthmān (reigned 644–656), and ʿAlī (reigned 656–661)

Explanation:

the cost of college has risen faster than inflation for many years.

the high price of student services and administration are two reasons for the rapid increase in cost.

the answer is "focused on"

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