Suitable Subject for the Email

Ana wants to send an email to her team with regard to additional information needed for the Safari campaign. The deadline for submission of the campaign is today. Which of the following shall be an appropriate subject line for the email?

$1)$URGENT$!!!$

$2)$Urgent need for Additional information for Safari campaign

$3)$Additional information for the Safari campaign

$4)$Additional information for the Safari campaign whose deadline is today