What is not a reason for subnetting a large network?

What is not a reason for subnetting a large network?

what is the answer here?

$1,$ Subnetting helps to improve the performance of the network by reducing the volume of network traffic.

$2.$ Subnetting simplifies network administration and creates more manageable network congestion.

$3.$ Subnetting increases the size of the network and network traffic, allowing more packets to be delivered.

$4,$ Subnetting enables network administrators to implement security policies and control network growth.