Answer: D - According to the Code of Professional Conduct, project managers should present the project truthfully and accurately to its stakeholders.
Mistakes do happen, but pretending they don't happen is going against the Code of Professional Conduct, which specifies that Project Managers need to be truthful, even about errors.
Putting the project’s needs before your own is something project managers should practice; however, by not addressing the mistake, Calvin would be dishonest about the project's status.
Key Take Away: Project managers are obligated to fully disclose any errors affecting the project. Saving face should not take precedent. Everyone makes honest mistakes, and taking accountability is usually appreciated and treated with respect.