"Amy was a little nervous, so she held onto her mother's hand as they walked up to the door. They knocked. No response. Amy tried again, this time more loudly. She thought she heard voices inside. Children's voices? "Amy tried pushing the door open and was startled when it moved! Why wasn't the house locked? Who was inside it? Still clutching her mother's hand, Amy began exploring. 'Hello?' she called out. 'Anybody home?'"

How did Amy most likely feel when she thought she heard children's voices inside the Old Stone House?
annoyed and angry
cheerful and excited
angry and upset
curious and scared