Which Body System does NOT contain tubular Body Parts?

Which of the following have stable, powerful transmitters and interference-resistant receivers?

A. Trunked radios B. Two-way radios C. Base station radios D. Mobile or portable radios

If a 3.0 drill bit is used to create a hole for a screw, what might be the size of the screw?

a. 2.5 mm b. 3.0 mm c. 3.5 mm d. 2.0 mm