How did the kings of Ghana become wealthy? A.
They mined salt from the region and sold it to neighboring regions.

B.
They controlled how much gold was available for trade.

C.
They used the trans-Saharan trade route to acquire expensive ivory.

D.
They learned to make weapons from iron and sold them to neighboring empires.

Which statement best explains why cells were observed in more detail using a compound microscope than a simple microscope? a compound microscope has greater magnification ability than a simple microscope. the compound microscope was invented before the simple microscope. a compound microscope is much easier to manufacture than a simple microscope. compound microscopes were more common than simple microscopes.