Users have been complaining that their Frame Relay connection to the corporate site is very slow. The network administrator suspects that the link is overloaded. Based on the partial output of the Router# show frame relay pvc command shown in the graphic, which output value indicates to the local router that traffic sent to the corporate site is experiencing congestion?（）

• A、DLCI = 100
• B、last time PVC status changed 00:25:40
• C、in BECN packets 192
• D、in FECN packets 147
• E、in DE packets 0