In each diary kept by the owner/engineer's or contractor's personnel, entries should be made: A. to document every working day, whether any work is performed or not, or even if you did not go to the project site that day. B. only if something of particular importance is happening. C. regularly each time that you visit a site where work is being done; however, no entry need be made unless you were personally at the site and witnessed work being performed. D. A diary is neither necessary nor desirable on construction.