Which of the following statements are false with regards to placement groups?

Answer options:

A.You can merge placement groups
B.A placement group can span peered VPC’s
C.A cluster placement group can`t span multiple Availability Zones.
D.You can move an existing instance into a placement group

Answer – A
The AWS documentation mentions the following on placement groups
1. You can`t merge placement groups. Instead, you must terminate the instances in one placement group, and then relaunch those instances into the other placement group.
2. A placement group can span peered VPCs; however, you will not get full-bisection bandwidth between instances in peered VPCs.
3. A placement group are of two types..
Cluster Placement Groups - A cluster placement group can`t span multiple Availability Zones.
Spread Placement Groups - A spread placement group can span multiple Availability Zones
For more information, please check:
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html
4.You can move an existing instance to a placement group, move an instance from one placement group to another, or remove an instance from a placement group. Before you begin, the instance must be in the 
stopped
 state.
 For more information on placement groups, one can visit the below URL:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html