Which statement is false for Constructive changes?

A. Constructive changes are contract changes which are construed from actions taken by either party, not from a change document. B. Field changes should be meticulously documented to avoid an interpretation as constructive change. C. Constructive changes are limited to the execution processes, when the product of the project is getting constructed. D. Constructive changes are a frequent cause of disputes and claims of one contract party against the other.