The EPBO for a particular employee on January 1, 2011, was $150,000. The APBO at the beginning of the year was $30,000. The appropriate discount rate for this postretirement plan is 5%. The employee is expected to serve the company for a total of twenty-five years, with five of those years already served as of January 1, 2011. What is the APBO at December 31, 2011? A. $31,500. B. $30,000. C. $42,800. D. $37,800.