A.
anwered by: canteau
SRAM/Avid adaptors include hardware to mount the adaptor to the frame/fork. The hardware to mount the caliper to the adaptor is included with the caliper. If you need additional hardware it can be found here:
http://www.treefortbikes.com/product/333222384838/1243/Avid-Disc-Caliper-Mounting.html