You make $45,000 per year at your current job with Whiz Kids Consultants. You are considering a job offer from Brainiacs, Inc., that will pay you $50,000 per year. Which of the following are elements of the opportunity cost of accepting the new job at Brainiacs, Inc.?

a. The increased time spent commuting to your new job

b. The $45,000 salary from your old job

c. The more spacious office at your new job.