How might the title of a literary work help you examine its purpose? The title identifies who the main characters are,

The title often suggests the message the author wants to send.

The title tells readers what they should expect to see in the plot.

The title always indicates the tone of the work.

The title often suggests the message the author wants to send.

Explanation:

the title does not always include the names of main characters, and you obviously cannot tell what to expect from the plot or the tone of the work by a title, so the answer is the title often suggests the message the author wants to send.

i guess you are missing the idea that has to be supported, am i right?