The Answer:
An Objective summary presents the main ideas in a text, leaving out all the supporting details and personal opinions, all the information that is not absolutely necessary to present the story must be eliminated.
The correct answer is B.
Through perseverance, the lighthouse keepers survive, deal with the rats, and are left in peace once again. This option gives important information about how the lighthouse keepers got rid of the rats in a short and precise sentence, it also avoids the use of personal opinions or unnecessary information. Besides, it tells the rest of the event in the story until the end of it.
Incorrect answer A.
The rats are frightening but can be resisted through perseverance and force of will. This option isn't correct because it includes descriptive language when it mentions how the rats are. Descriptions are unnecessary information in an objective summary.
Incorrect answer C.
The story shows how everyone should persevere even when faced with an invasion, fear, or peaceful circumstances. This option presents moral learning to readers which could be considered proof of personal opinion which is always avoided in objective summaries.
Incorrect answer D.
When the lighthouse keepers decide to persevere despite the rat invasion, which is the most important point in the story. The last option doesn't complete the story, an objective summary has to fully cover the story from start to end and in this sentence, all the information is about a specific moment.