15. The world's first supranational organization, was established after World War I.
It was initiated by U. S. president Woodrow Wilson, but because the U. S. did not actually sign it, the organization was
not very effective.

the answer is d. andesite. diorite and andesite have similar chemistries.

the other choices are wrong because:

basalt and gabbro have similar chemistries

granite and rhyolite have similar chemistries

pumice is just a rock that goes with no one

so the answer would be d. hope this