Answer: There should be no apostrophe before the S in 'content's'
Explanation: Because the content does not belong to anyone, and from the word 'are' we can tell that content will be plural, so the correct answer should be "contents are flammable".
She thought that a library should have a million books on every conceivable subject
Step by step is where the picture. 2: i don't know what ur talking abt i