Final answer:
The museum employee should calmly and politely remind the child of the no food or drinks policy and suggest enjoying the ice cream outside the museum.
Step-by-step explanation:
The museum employee's best response to seeing a child with a dripping ice cream cone near antique dolls would be to calmly and politely remind the child of the museum's no food or drinks policy. The employee should explain that the policy is in place to protect the artifacts and prevent any accidents or damage. Additionally, the employee can suggest that the child enjoy their ice cream outside of the museum to avoid any potential issues.
By addressing the situation calmly and providing a clear explanation, the employee can help educate the child about the museum's rules and ensure that the artifacts remain protected.