What did muhammad do when he encountered opposition from mecca’s city leaders? a. brought more followers to mecca b. he relocated from mecca to the city of medina. c. he threatened the leaders of christianity and judaism d. he fought againsts the arabs and won additional converts

B. He relocated from Mecca to the city of Medina

Mohammad's departure from Mecca (going to Medina) in the year 622 is known as the hijira. Hijira (also spelled "hijrah" or "hegira" in some variations of spelling in English) means an "exodus" or migration or movement.  Mohammad was warned of a plot in Mecca to assassinate him, by Mecca merchants who opposed him.  In Medina, Mohammad consolidated his following as the start of the Islamic movement, and returned to Mecca in 629 to conquer that city and prove that Allah was superior to the supposed gods of Mecca.

a)scientists

explanation:

the national defense education act had two main goals. the first one was to provide personal that was oriented to defense, including scholars, engineering students and so on. the other goal was to provide financial assistance for the students who would be enrolling at colleges and universities in the 1960s.