Read the incomplete summary of the passage.

After her brother runs away, Lala decides to find him and bring him home. Lala
thinks her brother has run away to a nearby island, and she meets a talking raven
upon her arrival. The raven knows where to find her brother, but Lala does not trust
him. She offers the raven some custard to persuade him to help her.
Which sentence should be added to summarize the passage?
A The raven agrees to help Lala and sends her on a wild journey to find her brother.
B Lala finds her brother in an old circus tent after she traps the raven and forces him to provide
directions.
C Lala knows her mother will reward her when she arrives home, and she follows the raven to
redeem her reward.
D The raven tries to trick Lala into giving up her custard, and she is left to find her own path
through the forest.

A The raven agrees to help Lala and sends her on a wild journey to find her brother.

The sentence that should be added to summarize the passage is option A: "The raven agrees to help Lala and sends her on a wild journey to find her brother."

To determine the correct sentence to add to the summary, we need to analyze the information provided in the passage. The passage states that Lala thinks her brother has run away to a nearby island and meets a talking raven upon her arrival. The raven knows where to find her brother, but Lala does not trust him. She offers the raven some custard to persuade him to help her.

Option A, "The raven agrees to help Lala and sends her on a wild journey to find her brother," is not supported by the passage. It does not mention that the raven agrees to help or that Lala embarks on a wild journey.

Option B, "Lala finds her brother in an old circus tent after she traps the raven and forces him to provide directions," is not supported by the passage. It does not mention Lala finding her brother in an old circus tent, trapping the raven, or forcing him to provide directions.

Option C, "Lala knows her mother will reward her when she arrives home, and she follows the raven to redeem her reward," is not supported by the passage. It does not mention Lala's motivation to redeem a reward from her mother.

Option D, "The raven tries to trick Lala into giving up her custard, and she is left to find her own path through the forest," aligns with the information provided in the passage. It states that Lala does not trust the raven, and the raven's intentions are unclear. This option suggests that the raven tries to deceive Lala, resulting in her needing to find her own path through the forest.

Therefore, the correct sentence to add to summarize the passage would be option D: "The raven tries to trick Lala into giving up her custard, and she is left to find her own path through the forest."