An Alexa Skill Builder Adds a Colleague to a Skill

An Alexa Skill Builder adds a colleague to a skill using the beta test feature. The colleague logs in to the developer console to edit the interaction model and cannot see the skill. Why is this happening?

A) The colleague needs the ROLE_ADMINISTRATOR enablement. The colleague needs the ROLE_ADMINISTRATOR enablement.
B) The skill was not submitted for publishing.
C) The colleague was not made an administrator in the beta test tool.
D) The colleague has not been added to the skill's developer account.