The area on S1 associated with the thumb is as large as the area for the forearm. This is an example of?

The area on S1 associated with the thumb is as large as the area for the forearm. This is an example of
A.sensory substitutionB.Braille projectionC.cortical magnificationD.the analgesic inversion principle
Which of the following is an “exploratory procedure” identified by Lederman and Klatzky?
A.enclosureB.pressureC.contour followingD.all of the above