wE CAn inFEr From thE tExt thAt "ComputEr litErAl" mEAns ______.
A．BEing ABlE to AFForD A ComputEr
B．BEing ABlE to writE ComputEr progrAms
C．working with thE ComputEr AnD FinDing out its vAluE
D．unDErstAnDing thE ComputEr AnD knowing how to usE it