Which of the following statements describes the effect of configuring mandatory Two Factor authentication (2FA) in Slack?

A. Members must have a sophisticated and complex password that is updated regularly.

B. Members must use a biometric reader to authenticate with Slack.

C. Members use single sign-on (SSO) to handle the exchange of usernames and passwords on behalf of Slack.

D. Members must submit a verification code along with their password each time they sign in.

Reference: https://slack.com/intl/en-pk/help/articles/212221668-Mandatory-workspace-two-factor-authentication-