PMP Question - Which one is correct?

A Project with a total funding of $100,000 finished with a BAC value of $95,000. What term can BEST describe the difference of $5,000?

A. Cost Variance
B. Management Overhead
C. Management Contingency Reserve
D. Schedule Variance

Source: http://www.quizlib.net/PlayingPublicTest.aspx?quizid=47

Management contingency reserve - Because Management reserve equals to project budget - Budget at completion

Management reserves almost equal to 5% of BAC that not included in the BAC.
Answer is C