Answer:
Your answer is: Queen Elizabeth 2
Step-by-step explanation:
The Titanic (option 1) is known for its tragic sinking in 1912 and is not the correct answer. The Queen Elizabeth (option 2) and Queen Mary (option 3) are famous ships but were not the longest-serving ships in Cunard's history in 2008.
The Queen Elizabeth 2 (QE2) is a renowned ocean liner that entered service in 1969 and remained in operation until 2008. It held the distinction of being the longest-serving ship in Cunard's history by that time.