In Contemplation of Death During Risky Surgery, Ben, a Guitarist

In contemplation of death during risky surgery, Ben, a guitarist, gives his guitars to Cathy. The surgery is successful, and Ben does not die. The gift of the guitars is​

A) ​not revoked because it was a gift causa mortis.
B) ​not revoked because it was a gift inter vivos.
C) ​revoked because it was a gift causa mortis.
D) ​revoked because it was a gift inter vivos.