Final answer:
The best thing for a case manager to do in the given situation is to be sensitive to cultural differences and seek out other recovery resources that align with the client's values.
Step-by-step explanation:
In the case of working with a Somali client who may not accept the concept of powerlessness in an AA program, it is important for the case manager to be sensitive to cultural differences and seek out other recovery resources that are relevant to the client's values (option c).