Consider an experiment in which participants were asked to remember chinese symbols called radicals (which have no sound) and symbols called characters (which consist of a radical plus another symbol). the fact that the participants were able to remember some of the radicals provides evidence for the operation of coding. a. semanticb. visualc. auditoryd. abstract

The answer is visual coding.

Explanation:

Visual coding is the process of encoding images and visual sensory information. Visual sensory information is temporarily stored within the iconic memory before being encoded into long-term storage. The participants memorized visual data and memorized symbols without sounds.

this doesn't support enough information to answer the question.