Question

read the text.
frances sneezed and rubbed the dust from her watering eyes. unused for decades, the top - floor parlor was full of shadows and furniture draped in old, billowing sheets. frances delighted in sharing ghost stories about the bailey mansion with the other house girls. \ghosts? stuff and nonsense!\ edith always said. but frances thought that edith might be singing a different tune if she were in francess shoes, stuck cleaning this gloomy parlor alone.
running her feather duster over ornate picture frames, frances heard a rustling behind her. she whirled around, looking for a mouse. mrs. bailey loathed mice, developing elaborate systems for their entrapment. frances saw nothing, but continued to hear a faint scratching sound. she crept into the shadows, gasping when her sleeve brushed the edge of the sheeted piano.
she took a deep breath and tried to steady her beating heart. its just a mouse, she reminded herself.
but as she scanned for a furry creature where the dark mahogany wall met the floor, she found something else. carved into the wall was a rectangle a few feet high. the edges lined up with the pattern of the wall, making it nearly invisible. a hidden door, thought frances, reaching out and touching a rusted latch. the rustling, now louder than any mouse, was clearly coming from the other side.
how does being in the parlor affect frances?
being in the parlor makes frances resentful of mrs. bailey for making her clean it.
being in the parlor strengthens francess belief that the mansion is haunted.
being in the parlor makes frances wish she had not shared ghost stories.

Explanation:

Frances is in a gloomy, unused parlor. She hears a rustling sound, initially thinks it's a mouse (but Mrs. Bailey's elaborate mouse - trapping systems are mentioned, so it's not just a normal mouse situation). Then she finds a hidden door with the rustling coming from the other side. The overall spooky atmosphere (shadows, old furniture, hidden door with mysterious rustling) strengthens her belief in ghosts (as she shares ghost stories about the mansion). There is no indication of resentment towards Mrs. Bailey for cleaning (just that Edith might change her tune if in Frances' shoes cleaning alone, but no resentment shown by Frances). Also, there is no mention of her wishing she hadn't shared ghost stories.

Answer:

Being in the parlor strengthens Frances’s belief that the mansion is haunted.