Final answer:
The CPI has 45 days to assess a family and close their case, as per the information provided in the referenced chapter.
The correct option is c.
Step-by-step explanation:
According to Chapter 39,
the CPI (Child Protective Investigator) has 45 days to gather all the required information to assess a family and close their case.
The answer to the student's question is therefore option c) 45.