"A. childrens'" is the proper answer because the musem belongs to the children, which is plural. If a single child owned the museum somehow, it would be The Child's Museum.
Answer:
Step 1: Identify an Inference Question. First, you'll need to determine whether or not you're actually being asked to make an inference on a reading test. ...
Step 2: Trust the Passage
Step 3: search for Clues
Step 4: Narrow Down the Choices
Step 5: Practice.
Explanation: