642-813的CASE1.1更新包一个选择题

wiserui

红头发讲解的《微题库CCNP 813 v1.1更新包》中的第三个问题
We learned that DSW1 doesn’t have the “standby 1 preempt” command so it can’t take over the active role again even if its priority is the highest. So we need to enable this command on VLAN 101 of DSW1.
Question 3:
DSW2 has not become the active device for Vlan103′s HSRP group even though all interfaces are active. As related to Vlan103′s HSRP group.  
What can be done to make the group function properly?
A. On DSW1, disable preempt
B. On DSW1, decrease the priority value to a value less than 190 and greater than 150
C. On DSW2, increase the priority value to a value greater 241 and less than 249
D. On DSW2, increase the decrement value in the track command to a value greater than 10 and less than 50.
Answer: B or C

原本DSW1是vlan103的备份网关
show running-config之后显示的是
DSW1的Vlan103优先级是200，默认减10
DSW2的vlan13优先级是190，默认减50

我觉得答案是C，而B应该改成less than 149 and greater than 141
请批评指正