Refer to the exhibit. Given the DHCP pool configuration shown on Router A, the Cisco IP phone will not boot up in the Teleworker location. What is missing from the Teleworker DHCP pool configuration?（）

• A、The DHCP pool needs to have an import all statement. 
• B、The DHCP pool is missing an option 150 ip 10.59.138.1 statement.
• C、The DHCP pool is missing an option 139 ip 10.59.138.1 statement
• D、The DHCP pool is missing a dns-server 10.59.138.1 statement.