Shivo's login credentials to log into work have been stolen. As a result, he is continuously receiving SMS text messages from the MFA app on his phone. Shivo thinks it might be an MFA fatigue attack but is not sure. What should he do$?$

a$.$ Contact the help desk.

b$.$ Ignore the messages.

c$.$ Login to his account and change the password immediately.

d$.$ Accept the MFA push notification and then change the password.