The earliest example of managed care $($managed care $1\mathrm{.}0)$ was pioneered by $().$ Initially developed to provide healthcare for $()$ industrial workers, it eventually fostered innovative ideas that revolutionized fundamental healthcare practices. Strategies such as capitation, gatekeeping, a focus on primary care, and practice guidelines were instrumental in standardizing patient care levels and controlling costs. Please complete the blanks by selecting the most appropriate answer.

Kaiser

Anthem Blue Cross

Intermountain

Vivity

Blue Cross