You Receive an Intellgence Alert Notifying You That There Has

Multiple Choice

You receive an intellgence alert notifying you that there has been an unexpected spike in your traffic. Which of the following could be possible reasons for this spike?

A) The tracking code has been altered and is reporting incorrectly
B) There is a new referral source that is directing a lot of new traffic to the site
C) There is unidentified referral traffic that is likely bot traffic
D) New pages or subdomains have been recently indexed in organic search
E) All of the above