Developed the city of Timbuktu as a center of learning • was the source for almost half of the world's gold during the 14th century
• gained control of the West Africa trade routes after the fall of Ghana

Which African empire is described in the box above?
A.
Songhai
B.
Mali
C.
Nubia

C the answer is C I did the test?

The answer is C that test is pretty easy

Ifound the exercise on the internet. attached is the list mentioned above.in order for a compound to be considered optically active it can't have any axis or plan of symmetry. the molecule  shouldn't also  be superimposable on its mirror image.with such considerations, the compounds that are optically active are: -third compound on the first image is optically active; -second and third compound from the second image are optically actives.