C. A painting that artists create by applying pigments to damp plaster walls.
The word condemn means to blame.
It required all territories to abolish slavery before becoming states.
And it made the mississippi river the divding line between slave states and free states. it also prohibited slavery in most of the former louisiana territory except for missouri.
Answer: D.) They study the stars and gases around black holes.
Explanation: Given the technology that we have in the 21st century (as of 2020), scientists cannot study black holes directly, and must resort to observing and detecting how the presence of them exists by noting how they take an effect on the matter surrounding them.
