Refer to the exhibit.  What problem is preventing users on VLAN 100 from pinging addresses on VLAN 200？（）

• A、No default route on DLS1.
• B、Encapsulation mismatch between switches.
• C、Native VLAN mismatch.
• D、Subinterfaces should be created on Fa0/7 and Fa0/8 on DLS1.
• E、Trunking needs to be enabled.
• F、The ip routing command is missing on DLS1.