题目内容：
根据以下内容，回答题。Telephone Billing Statement_______city Phone Cellular
City Phone Cellular
Department of Billing Services
51 Dublin St．，Suite 301
Springfield，WI
Invoice Date：08—15—2006
Payment Due Date：09—14—2006
Customer Information
Name：Desire Eberhardt
Account Number：1 0003483一FFT"
Account Information
Current Charges：$6 1．59
Outstanding Balance：$35．08
Total Amount Owed：$96．67
Pay your bill online at WWW．cpcellular．tom and receive a discount of 3%before taxes are added．If you have questions about this or other City Phone Cellular policies，please contact our customer service department at 1-888—349—5959．
Billing Summary Amount Owed
Current Charges：
City Phone Premium Cellular Package$49．95
State Taxes$5．65
Service Fee$5．99
Total Current Charges$6 1．59
Previous Charges：
Balance as of Last Month$55．08
Payment Received Last Month$20．00
Outstanding Balance$35．08
Total Amount Owed$96．67
How can City Phone Cellular customers receive a discount? A．By applying for an account online
B．By paying their balance early
C．By calling the customer service department
D．By paying over the Internet
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答案解析：