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