Two weeks before reaching a major milestone, an unidentified risk is realized. The risk will have a profound effect on the financial health of the project, nearly doubling the actual costs to complete the work. Which of the following is the BEST action for the project manager to consider?

A. Meet with the project sponsor and other senior stakeholders to review the risk management plan and determine if the effort should be continued.
B. Continue the project work as planned through the upcoming milestone, and then determine the appropriate response.
C. Trigger the incident response plan and gather the project participant's opinions on the best way to move forward.
D. Implement a full project stop, and then provide the risk information and updated financial metrics to all stakeholders.