A 27-year-old Korean marathon runner presents to the first aid station at mile 18 with intense pain in her right foot. She is taken by ambulance to an ER, where an X-ray demonstrates a number of...

A 27-year-old Korean marathon runner presents to the first aid station at mile 18 with intense pain in her right foot. She is taken by ambulance to an ER, where an X-ray demonstrates a number of microfractures. What are these fractures called?

A. Spiral fractures

B. Simple fractures