An intervention to improve receptive vocabulary involves a computer program that presents three pictures on the screen and requests that the child point to the picture that the computer indicates via digitized speech. The child's intervention goal is 80 percent correct responding. A response rate of 30 percent correct most likely indicates that the
(A) software has been moderately effective in helping the child reach his goal
(B) child's visual discrimination surpasses his auditory discrimination
(C) child's responses are essentially random
(D) child is ready to progress to an on-screen array of four pictures