To Avoid the Bitter Taste When Chewing the Leaves of the Coca

To avoid the bitter taste when chewing the leaves of the coca plant, indigenous people also

A) chew calcium obtained from sea shells.
B) chew lime obtained from sea shells.
C) mix sea salt with the leaves of certain trees and chew the wad for a while.
D) soak coca leaves with seaweed in a vat filled with water and slowly heat the vat until it begins to boil, let it cool, and then chew the coca leaves.