Final answer:
The best sentence from the article to support the statement about passengers fighting back on the fourth plane is A, which directly depicts their collective decision to act after learning about other attacks.
Step-by-step explanation:
To provide the BEST support for the statement that passengers on the fourth plane fought back after hearing about the attacks in New York and Washington, the correct sentence from the article would be: A. The passengers and flight attendants heard about the attacks in New York and Washington and decided to fight back. This sentence directly supports the assertion that passengers were spurred into action by news of the other attacks, leading to their attempt to retake the plane. While mentioning other passengers and their individual actions, such as Todd Beamer's statement in option B and Sandy Bradshaw's preparation in option C, sentence A encapsulates the collective decision and response of the passengers and flight attendants overall. Option D, while it does state the passengers fought the hijackers, fails to mention the motivation behind their actions, which is crucial for supporting the statement.