What is the address of the HOSA chat room on the internet?

The correct answer is based on the official structure of HOSA's communication channels. The address "Chatroom@hosa.org" follows the standard convention for email addresses associated with a professional organization. Specifically, it combines a relevant descriptor ("Chatroom") with the official HOSA domain ("hosa.org").

Using the correct case in an email address is essential as it reflects the established brand and professionalism of HOSA. The option "Chatroom@hosa.org" uses the proper format, conveying that it is intended for conversations or discussions related to HOSA.

In contrast, the other options might have minor variations like using a different word or incorrect domain structures, which would not align with the official email naming conventions of the organization and may lead to confusion or miscommunication.