Vertical communication consists of messages exchanged at the same hierarchical level in an organization

Which perceptual cue makes this image appear 3D? (red 3D ball)

A) Size of shapes assumed equal B) Color intensity C) Distance between shapes assumed equal D) Occlusion

Which theory of communication states the public will not have faith in a writer's message, or act on it, if it clashes with their existing beliefs?

a. Cognitive dissonance b. Diffusion c. Adoption d. Source credibility