单项选择题

When troubleshooting an 802.11g network. Which of the following can interfere with the network?（）

A. 2.4 GHz cordless phone
B. 900 MHz cordless phone
C. Bluetooth headset
D. Bluetooth printer

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220-702

When troubleshooting an 802.11g network. Which of the following can interfere with the network?（）