A lump in the testes can be caused by 

The most common methods of stress testing include which of the following?

A) Bicycle ergometer and stair-stepper B) Stair-stepper and arm ergometer C) Treadmill and bicycle ergometer D) Arm ergometer and treadmill

A(n) ________ health technician assists the psychiatric team by observing behavior and participating in group therapy and counseling sessions. 

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