Contemporary models of mental health care for older people often incorporate integrated approaches to address the relationship between mental health disorders and substance abuse. Considerations such as cultural safety play a crucial role in providing effective care. Which of the following strategies are typically used in these models?

a) Integrated dual diagnosis treatment, which involves simultaneously addressing mental health and substance use disorders
b) Harm reduction strategies, focusing on minimizing the negative consequences of substance use
c) Culturally sensitive approaches to account for diverse backgrounds and beliefs
d) All of the above