You are a project manager of a small construction project. Your project was budgeted for US $72,000 over a six week period. As of today, you’ve spent US $22,000 of your budget to complete work that you originality espected would cost US $24,000. According to your schedule, you should have spent US $30,000 by this point. Based on these circumstances, you project could be BEST described as （）.
A．under budget
B．over budget
C．on budget
D．need more info