Purposes of a Needle-Capping Device Include Which of the Following

Multiple Choice

Purposes of a needle-capping device include which of the following?
1) To isolate the sample from air exposure
2) To help prevent needlestick injuries
3) To hold the excess anticoagulant

A) 1 and 2 only
B) 1 and 3 only
C) 2 and 3 only
D) 1, 2, and 3