Do parents need to be Google Calendar or Gmail users to receive Google Calendar invitations?

The correct choice indicates that parents do not need to be users of Google Calendar or Gmail to receive invitations. This is because Google Calendar allows event invitations to be sent via email, and any email address can receive these invitations, regardless of whether the recipient has a Google account. When someone sends a Google Calendar invite, the recipient receives an email notification that includes details about the event, and they can respond to the invitation without needing to be logged into Google services.

In this way, the functionality of Google Calendar is designed to facilitate communication and collaboration, even with individuals who are not part of the Google ecosystem. This feature is particularly useful for parental communications since they may not always have a Gmail account or use Google Calendar.