During routine maintenance， it became necessary to shutdown G1/0/1 on DS1 and DS2. All other interface were up. During this time， DS1 became the active device for Vlan104’s HSRP group. As related to Vlan104’s HSRP group.  What can be done to make the group function properly ？ （）

• A、 On DS1， disable preempt
• B、 On DS2， decrease the priority value to a value less than 150
• C、 On DS1， increase the decrement value in the track command to a value greater than 6
• D、 On DS1， disable track command.