Which three of the following are successful examples of strategic IT investments improving operational agility?

A company offers mobile email to its employees, who can then react faster to requests.

A company implements collaboration solutions, which simplified information exchange.

A company changes its security strategy from "lock down" to "secure access from anywhere", so that users are "always-on" and can easily work remotely.

A company implements EnergyWise solutions, which drastically reduce energy costs.?

A company provides support for a BYOD solution, which increases the investment and requires network upgrades, but provides limited improvements compared to a well-known remote access solution.