You didn't give anything...there's no following answers to go from lol
She wants her children to find her and rescue her.
A. Miss Grundy told Archie that he really spent a lot of time on his homework. As to what made her say this, it wasn't explicitly explained until the later parts of the conversation. Archie took this as a positive remark.
B. Archie asked Miss Grundy if his homework was decent. Archie was pleased that her teacher knew he spent time on his homework and asked if his work pleased her.
C. Miss Grundy really meant that Archie spent a lot of time on his homework because of the numerous stains from a whole evening's worth of snacks. It didn't mean that Archie's work was good, just that he spent a lot of time on it.