Prevention, recognition, and legal equality for people with mental disabilities were among the stated priorities of the system of asylums in the early 1900s. the President's Committee on Mental Retardation. the eugenics movement. the 1918 Smith-Sears Veterans Rehabilitation Act.

To address the question regarding the priorities of prevention, recognition, and legal equality for people with mental disabilities, we can analyze the options provided: 1. **The system of asylums in the early 1900s**: This system primarily focused on confinement and often lacked humane treatment and rehabilitation for individuals with mental disabilities. The priorities of prevention and legal equality were not central to this system. 2. **The President's Committee on Mental Retardation**: Established in 1966, this committee aimed to improve the lives of individuals with intellectual disabilities through advocacy, research, and policy recommendations. It emphasized prevention, recognition, and legal equality. 3. **The eugenics movement**: This movement, which gained traction in the early 20th century, often promoted the idea of preventing reproduction among individuals deemed "unfit," including those with mental disabilities. It did not prioritize legal equality or recognition in a positive sense. 4. **The 1918 Smith-Sears Veterans Rehabilitation Act**: This act focused on providing vocational rehabilitation for veterans returning from World War I, including those with disabilities. While it aimed to assist veterans, it did not specifically address the broader issues of prevention and legal equality for all individuals with mental disabilities. Based on this analysis, the option that aligns most closely with the stated priorities of prevention, recognition, and legal equality for people with mental disabilities is **the President's Committee on Mental Retardation**.