The sentence that best helps readers determine the story’s setting is:
"The morning mist was completely gone. The sun was strong and bright, intensifying the color of a row of potted marigolds on the front porch of one of the houses."
This sentence provides descriptive details about the weather and visual elements (the morning mist, the strong sun, and the marigolds), which help establish the time of day and the physical environment, contributing to the overall setting of the story.