When Robert includes elements in his clients' advertising campaigns that are rare, surprising, or move away from the obvious or commonplace, he is changing the factor of divergence.

When Robert includes elements in his clients' advertising campaigns that are rare, surprising, or move away from the obvious or commonplace, he is changing the original factor of divergence.

Explanation:

When Robert includes elements in his clients' advertising campaigns that are rare, surprising, or move away from the obvious or commonplace, he is changing the originality factor of divergence.Advertising campaigns drew attention on social and educational psychology literature that defines creativity as divergent thinking.The Fluency refers to the number of appropriate ideas proposed in response to a given question and originality measures that refers to the uniqueness and non-repetitive response are.

Ithink it would be choices a and b. hope this !