【单选题】
Refer to the exhibit. What type of interface will connect the voice gateway router R1 to the analog phone and the fax machine?（）<img src="https://nimg.ppkao.com/2018-07/zhanglijun/2018072414005261821.jpg?sign=093dba2168ae0806f5b6542c4f9c1845&t=62d32bc7" />
A、the analog phone will be connected to the FXS port， and the fax machine will be connected to the FXO port on router R1
B、the analog phone will be connected to the FXO port， and the fax machine will be connected to the FXS port on router R1
C、both devices will be connected to the FXS port on router R1
D、both devices will be connected to the FXO port on router R1
E、both devices will be connected to the E and M ports on router R1
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