Read the following paragraph and decide which of the five statements are true. (More than one answer may be true) Target is one of the US's largest retailers. In 2013, Target was attacked by a Ukrainian hacker, known as Rescator, resulting in the theft of $18.5 million from Target customers. The hack began when one of Target's subcontractors, a ventilation and air conditioning company received emails containing malware. An employee at the subcontractor opened the message which installed the malware. This allowed the malware's contractors to gain access to the subcontractor's computers and from there to Target's own network. Between November and December, the hackers installed malware that could steal credit card information on point-of-sale computers in most of Target's stores. In early December, the hackers retrieved the stolen data and sent it to computers in Russia where it was resold to organised criminals. Select one or more: a. The Target hack began with a spear phishing attack b. Target experienced an advanced persistent threat c. The original emails represent a persistent threat Od. The malware installed by the hackers represent a persistent threat e. All three of the CIA principles were affected by the Target attack