Reference:
https://www.cisco.com/c/en/us/td/docs/security/esa/esa11-1/user_guide/b_ESA_Admin_Guide_11_1/ b_ESA_Admin_Guide_11_1_chapter_010101.html

Spam threshold is a setting that determines the minimum score that a message must have to be classified as spam by Cisco ESA. The lower the threshold, the more aggressive the spam detection is.

A content filter action is an operation that Cisco ESA performs on a message if it matches the conditions of a content filter rule, such as headers, envelope, body, attachments, etc.
Quarantine is a valid content filter action that allows Cisco ESA to store the message in a quarantine area for further review or release by an administrator or an end user.
The other options are not valid content filter actions on Cisco ESA.

Explanation/Reference:
Reference: https://www.cisco.com/c/en/us/support/docs/security/email-security-appliance/213940-esa- using-a-message-filter-to-take-act.html