Which of the following statements correctly describes the zygapophyseal joints of the thoracicspine?
A. They are best demonstrated on a lateral thoracic spine radiograph
B. They are oriented in a plane 20 degrees from the midsagittal plane (MSP)
C. They are oriented in a plane 20 degrees from the midcoronal plane (MCP)
D. They are best demonstrated on an AP thoracic spine radiograph