Cancer can spread to other areas of the body through the lymphatic system

Which of these statements is false?

A) The paralleling technique does not meet all five shadow-casting principles in all regions of the oral cavity on all patients. B) With the paralleling technique, it is not possible to direct the central rays of the x-ray beam to both the tooth and the image receptor simultaneously. C) The paralleling technique is the technique of choice for obtaining periapical radiographs. D) With the paralleling technique, the object and image receptor are positioned parallel to each other.

There are two main types of ________. One type simply receives a phone number, and the other type can both send and receive messages.

Fill in the blank(s) with the appropriate word(s).