What steps can be taken if IPS is causing a High Performance Impact?
A. Consider activating the "Bypass under Load" IPS setting on the gateway
B. Check your IPS configuration assigned to this gateway and deactivate protections with critical or high performance impact
C. Determine if different or custom IPS profiles are better suited for different gateways in your organization
D. All options listed
Not sure about option 3, but
A & B are correct
https://sc1.checkpoint.com/documents/R76/CP_R76_IPS_AdminGuide/12831.htm