What year had mecca, jerusalem, cairo, baghdad, and saragossa come under muslim control

These cities became under Muslim control during 661-750.

answer; /// i believe that the correct answer is (d)the huang he river valley;

the triple alliance. germany and austria-hungary were already allies by 1879 when, worried about a threat from russia, they formed the dual alliance. italy joined the group in 1882. there was a concern about a possible attack from france and the alliance needed powerful friends to defend it.