Question: Which of the following is a challenge or barrier to policy and practice changes? (Check all that apply.) Group of answer choices They require collaboration between multiple entities involved in forming health and social policies. The amount of government funding to public health programs has increased since the COVID-19 pandemic. U.S. health policy continues to demonstrate a primary focus on health care rather than prevention. Adopting a life course perspective on MCH research would lead to (or require) changes to policy and practice.