Amendment xv was ratified in 1870. what was the significance of this amendment?

a) it gave people to right to impeach the president.

b) it gave citizens the right to free speech.

c) it gave women the right to vote.

d) it gave african americans the right to vote.

well i'm late but i think its: b, c, and e

the invasive species was introduced due to commercial purpouses, as there was a demand for fur clothes and hence, a business opportunity connected to this product. actually, it was when the nutrias scaped, causing harm to the us ecosystems when they acquired the status of invasive species. in this case they have caused an environmental problem, but it could have affected also economic interests or even human health.