
Answer:
If she were to wonder she could look for certain clues
Explanation:
There could be a few explanations as to why the kitchen was covered with flour
First could be that the door was left open and animals that are interested in food or shelter could come in and find the flour
Second it could have been caused by an open window that let in very strong wind enough to knock over the flour
And lastly, it could have been the boys lying to their mom and they indeed accidentally knocked over the bag of flour while trying to get to the cookies.
To solve her issue Mrs Smith could look for animal prints, an open window or missing cookies and child's prints.