In history such as World History? You should be able to distinguish the trends and differences in different periods say "Period 1 vs. Period 2" where each period represents a different range of years (in AP World History I learned it with 6 periods but it varies from year to year of when it is taught)
The best answer choice would be, "C". If you are possessing bad imaginations for yourself, it is most likely you can counter it with GOOD ones.
I hope this helped!
I think its a context clue for a producer or well an inorganic chemical reaction.
C.
The door is made of glass, which is an example of non-porous surface.
Ninhydrin is one of the most widely used reagents for chemical development of fingerprints on porous surfaces.
The correct answer would be C. Hope this helps.
