Long-term trends for private employer-sponsored insurance indicate that: Group of answer choices the continued popularity of the preferred provider organization is reflected by the fact that it is still the fastest growing form of insurance. there is a resurgence in the popularity of traditional indemnity insurance coverage. the high-deductible health plan (HDHP) is now the most popular form of insurance for private sector employees covered by group plans. almost one-third of private sector employees covered by group plans are enrolled in some form of high-deductible health plan. enrollment in the staff-model health maintenance organization is becoming more popular