Twitter's organizational chat$$ges were because they came in response to forces inside and outside the organization.

The table lists several forces that could incite organization change. For each item, categorize the force as an internal or external force.

$\backslash$table$[[$Force$],[$Rapid growth in a competitor's user base$],[$New ad formats offered by competitors$],[$Company owners' desire for higher rate of return on investments$]]$