Modern mathematical systems spread outward from India via a. conquest
b. migration
c. religious missionaries.
d. trade routes.

battle of saint-mihiel, (12–16 september 1918), allied victory and the first u.s.-led offensive in world war i. the allied attack against the saint-mihiel salient provided the americans with an opportunity to use their forces on the western front en masse.

explanation:

answer; /// (c) i believe that the correct answer is; ///full faith and credit.

a big wall across the mexican border so no drugs, terrorist, or illegal immigrants can come through : )    

the effect of the ming leaders banning ships with more than two masts was that there was no further construction of ships masts, because there was a surplus. ming emperors disallowed foreign exploration