When Using a Portable C-Arm for a Surgical Hip Pinning

Multiple Choice

When using a portable C-arm for a surgical hip pinning,

A) sterility will be maintained using a "shower curtain" approach.
B) snap covers are not recommended.
C) the surgeon can reach through the curtain and move the C-arm manually.
D) an additional sterile towel is positioned over the incision site and then removed when the C-arm is brought into the field of view for imaging.