From The Mixed-up Files Chapters 9 & 10

Claudia spent more time washing up before lunch because she took a bath.

Jamie called Mrs. Franweiler's house a museum when he saw it.

not-available-via-ai

In the given question, it is asked what Mrs. Frankweiler served for lunch. Among the options provided, the correct answer is "Macaroni and cheese". This means that Mrs. Frankweiler prepared and served macaroni and cheese for lunch.

Mrs. Frankweiler did not sell the sketch because she wanted to keep the secret. This suggests that the sketch held some kind of valuable information or personal significance that she did not want to share with others. Selling it would have meant revealing the secret, so she chose to hold onto it instead.

The correct answer is "There was a sketch of an angel drawn by Michelangelo." This is because the question asks for the secret, and out of the given options, the only one that relates to a secret is the fact that there was a sketch of an angel drawn by Michelangelo. The other options do not mention anything about a secret.

Mrs. Frankweiler allowed Claudia and Jamie one hour to find the secret file containing the sketch of angel.

Jamie said that the nature of his and Claudia's business was seeking information about the Italian Renaissance.

Saxonberg was the children's grandfather, as mentioned in the question. There is no mention of him being Mrs. Frankweiler's lawyer, her husband, or the head of the museum.

Claudia considered having the secret of everything to be the most fun part of running away. This implies that she enjoyed the thrill and excitement of keeping her plans and actions hidden from others, which added a sense of adventure and mystery to her experience.