Please answer the following question about this movie plot. If it's un-answerable, please output "No answer". Question: Why must the house be perfectly clean? Movie plot title: The Cat in the Hat Movie plot: Conrad and Sally Walden live in the city of Anville with their single mother Joan Walden, who works for Hank Humberfloob of Humberfloob Real Estate, Hank Humberfloob warns Joan the day the movie takes place that she will be fired if her house is messy for the upcoming meet and greet party (because of his germaphobia). Later that day, Conrad trashes the house, causing their dog Nevins to run down the street in fright. Joan punishes Conrad for a week while re-cleaning the house. Their next-door neighbor, Lawrence Quinn, whom Joan is dating to Conrad's dismay, brings back Nevins, and Sally is grateful. When Lawrence leaves, Joan is called back to the office again, leaving the kids with Mrs. Kwan, a lethargic babysitter, and making sure they are not allowed to enter the living room, which is being kept pristine for the upcoming party. Lawrence is constantly on the lookout for any mischief that Conrad is up to, as he wants nothing more than to send him away to military school for the rest of his life, earning Conrad the reputation of "troublemaker", while his sister is characterized as "perfect and well-behaved". Once their mother leaves, and Mrs. Kwan is falling asleep, Sally and Conrad discover a humanoid, oversized talking Cat in their house. The Cat wants them to learn how to have fun, though the children's pet Fish doesn't want the Cat around while Joan is away. In a series of antics, the Cat balances some stuff, ruins Joan's best dress, jumps on the living room's couch, and bakes cupcakes that explode. In the process, he even releases two troublemaking Things from a crate that he explains is actually a portal from their world to his. The Cat tells Conrad that he only has one rule: to never open the crate. The Cat tells the Things to fix Joan's dress; however, they end up wrecking the house instead, since they only do the opposite of what is said. Despite the Cat's warning, Conrad picks the lock anyway. When the crate's lock attaches itself to the collar of the family dog, Nevins, which then escapes, the Cat...
A:
upcoming meet and greet for work with mother's germaphobic boss.