Ajanka, a medical student entitled to an annual allowance of N6,000, decides to leave the university to take up a job where he earns N7,000 per annum. By this singular act, the national income level will?

• A.increase by N1,000
• B.decrease by N 7,000
• C.increase by N7,000
• D.increase by N 13,000
• E.