Which answer choice correctly describes how the US Constitution fixed a problem or problems of the Articles of Confederation? OA. Under the Constitution, the people could directly elect their representatives in the US Senate,
B. Under the Constitution, the state governments were granted more control over immigration and trade,
OC. Under the Constitution, the federal government had the power to enforce laws but was checked by Congress and the court system,
D. Under the Constitution, political candidates must be a member of a political party so that they represent the interests of the people.

C

Explanation:

Im going with my gut feeling so if it isn't correct sorry

question - in 1827, john walker, a druggist in a small english town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. the druggist had discovered the first friction-chemical match, the kind we use to-day. it is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. although walker's match did not require the bottle of acid, nevertheless it was not a good one. it could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. in a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. the match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. it would ignite when rubbed on any dry surface, and there was no longer any sputtering. this was the phosphorus match, the match with which we are so familiar. according the paragraph what was the benefit of the new phosphorus match? it burst into flame when rubbed on sandpaper. it was made by mixing chemicals. it could be ignited on any dry surface. it threw fire in all directions.

answer - matches required natural chemicals