Final answer:
The instrument used to grasp the cervix during a D & C is a tenaculum.
Step-by-step explanation:
When performing a D & C (dilation and curettage), the instrument used to grasp the cervix is called a tenaculum. The tenaculum has two prongs that are inserted into the cervix to hold it in place during the procedure. This helps to stabilize the cervix and allows the doctor to safely perform the dilation and curettage.