What is the main difference between the information displayed on the dspload and the dsptrkutl screens？（）
- AThe dspload screen is for all trunks； the dsptrkutl screen is for one trunk
- BThe dspload screen shows the expected traffic； the dsptrkutl screen shows actual traffice
- CThe information on the dspload screen never changes； the dsptrkutl screen is dynamic
- DThe dspload screen shows historical information； the dsptrkutl screen shows current informatio