Which of the following is synonymous with a lack of agreement?

A lack of agreement is best described by the term "discrepancy," which refers to a difference or inconsistency between two or more facts, figures, or opinions. When there is a discrepancy, it indicates that there is not a uniform understanding or consensus, which aligns with the concept of a lack of agreement.

Discrepancies can appear in various contexts, such as statistical data, testimonies in an investigation, or differing viewpoints in discussions. This divergence highlights the absence of harmony or agreement among the involved parties.

The other terms do not relate to the concept of disagreement. "Discreet" refers to being careful or circumspect in one's speech or actions. "Decisive" outlines the ability to make decisions effectively and firmly. "Diligent" describes a person who is careful and persistent in their work or duties. Therefore, none of those terms capture the essence of disagreement or lack of consensus as effectively as "discrepancy" does.