According to Gentile's Multidimensional Classification System, the Simplest Skill Would

According to Gentile's multidimensional classification system, the simplest skill would be one whose

A) Environmental context is stationary, involves no inter-trial variability or body transport and does not require object manipulation
B) Environmental context is in motion, involves high inter-trial variability and requires both body transport and object manipulation
C) Environmental context is in motion, involves high inter-trial variability, requires body transport but does not require object manipulation
D) Environmental context is stationary, involves high inter-trial variability, requires body transport but does not require object manipulation