Answer :
"The door was red, with a small, brass handle in the middle." This is an objective sentence because it is stating facts. The other sentences are interpretations by the speaker.
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The answer would be The door was red, with a small, brass handle in the middle." because the narrator isn't telling us about a characters feelings & it is also describing something so we have an image of what it looks like , Like a video camera that follows the characters and the action, this type of narrator reports on events and lets the reader supply the meaning. It wouldn't be "Without more information, I was unable to make up my mind." because this is first person, I know this is first person because it includes "I". It also wouldn't be "Sammy felt afraid, but Marissa was filled with excitement." because this is omniscient because the narrator is telling us what everyone is thinking and feeling and reveals that information to the reader. Lastly it isn't "She wrote her book slowly, savoring every word she typed." because this is limited omniscient the narrator is telling us the thoughts, feelings, and experiences of a single character.