Which ONE statement is TRUE about data duplication technique?

$1.$

In a peer$-$to$-$peer replication strategy not all replicas are equal.

$2.$

If you write data to two different nodes, you don't need the nodes to coordinate to avoid any conflict.

$3.$

For a data duplication strategy to be successful, only a majority of the nodes need to reach consensus on the write operation.

$4.$

Machine read$/$write latency is a bigger factor than network traffic latency in any data duplication strategy.