Answer: According to Piaget, May Lin's ability to use a doll as a representation of a real baby illustrates that she is capable of: SYMBOLIC FUNCTION.
Explanation: Symbolic function in Piagetian theory illustrates the ability of an individual to mentally use an object (the doll) to represent something that is not physically present (her baby brother).
TRAIL OF TEARS is the forced migration of the Cherokee Indian to Oklahoma in 1838 to 1839.
As part of Andrew Jackson's Indian removal policy, in 1838 through 1839, the Cherokee were forced to gave up their lands and to migrate to another area, which is located in the modern day Oklahoma. The migration had devastating effects on the people and more than 4000 of them died.