Which best completes this diagram about the fourteenth amendment?
a) citizens of the united states must vote during every election.
b) states must give equal protection under the law to all citizens.
c) states must have their constitutions approved by the federal government.
d) citizens of the united states must follow federal laws before state laws.

The correct answer is B.

The 14th Amendment to the US Constitution was ratified in 1868 during the Reconstruction Era, after the US civil war. It included the Equality of Rights provision, that guaranteed equal rights for all US citizens, and it explicitly prohibited that the US federal or state goverments prevented any citizen from accesing their consitutional rights.

Moreover, the 14th Amendment granted citizenship to every US inhabitant without discrimination in terms of race and it also guaranteed due process to every US citizen.

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