Does the United States of America have an official language? Please do not answer this, if you are unsure with your answer.
I need it to be correct

Gemstones are commonly found in pegmatites, which are igneous rocks that are a. exceptionally mafic b. exceptionally coarse grained c. exceptionally fine grained d. extrusive, forming from lava

The vegetation that thrives in the tundra is limited to a. mosses, barley, wheat, and corn. b. coniferous trees. c. dwarf shrubs, mosses, lichen, potatoes, and beans. d. mosses, lichen, algae, and dwarf shrubs.

In the 1400s, portugal’s economy was based on a. industry b. exports c. finance d. trade