How far north did islam spread in the 600's? how far east?

Ineed answers 5 and 6 on my social studies homework reply to this question i posted

What explains the increase in life expectancy in botswana? a. the increased availability of jobs and an improved economy b. access to antiretroviral drugs, hiv/aids education, and widespread hiv/aids testing c. a series of military takeovers that stabilized the political system and led to education reform and increased literacy rates d. a recent military coup that led to an improved healthcare system select the best answer from the choices provided.

What are some incentives that parties have to carry out their campaign promises?