An Upgrade to a Web Application, Which Supports 400 Users

An upgrade to a web application, which supports 400 users at four sites, is being tested. The application runs on four servers behind a load balancer. The following test plan is proposed: Have 50 users from site A connect to server 1 Have 50 users from site B connect to server 2 Have 50 users from site C connect to server 3 Have 50 users from site D connect to server 4 Which of the following parameters is being properly tested by this plan?

A) Sizing
B) Connectivity
C) High availability
D) Performance