(a) If only part of an item or category of item in a demand for inspection, copying, testing, or sampling is objectionable, the response shall contain a statement of compliance, or a representation of inability to comply with respect to the remainder of that item or category. (b) If the responding party objects to the demand for inspection, copying, testing, or sampling of an item or category of item, the response shall do both of the following: (1) Identify with particularity any document, tangible