CC3 is your risk assessment, and it has to be current, consider fraud explicitly, and visibly drive the controls tested elsewhere in the report. Auditors trace from a risk in your register to the control that addresses it, so a risk assessment that exists but connects to nothing is a recurring finding.
CC3 Risk Assessment contains 4 criteria. The Trust Services Criteria define 61 in total: 33 Common Criteria across CC1–CC9 plus the criteria for the Availability, Confidentiality, Processing Integrity and Privacy categories.
Yes. CC3 is part of the Common Criteria, which apply to every SOC 2 engagement regardless of which additional categories you scope in.
A Type 1 assesses whether the controls are suitably designed at a point in time. A Type 2 also tests whether they operated effectively across a review period, typically 3 to 12 months, by sampling evidence from throughout that window. Most customers asking for a SOC 2 mean Type 2.