They lost their way in the forest, and _____. Which of the following is wrong? [ ]

A. what made matters worse was that night began to fall

B. what was worse, it was getting dark

C. to make matters worse that night was falling

D. worse still, night had fallen

某企业6月份销售A产品一批，货款20万元，下月才能收回，6月份销售B产品一批，货款15万，本月已收讫；6月份收回上月赊销给思达公司的A产品货款30万元，按权责发生制原则，该企业6月份的收入应为( )万元。

A．35
B．45
C．50
D．65