Nielsen report also finds one-third of c-store shoppers expect to purchase fresh food in the channel in the future.
Retailers see continued pressure on cigarette volumes.
AACS study envisions new fuels, geo-marketing, locally sourced food, drones, and other consumer-driven advances.
Beverage Buzz survey finds some brands and segments improved, though.
Texas retailer bumps Q2 frontrunner Kelley's Market to No. 2 spot in four of six categories.
Collaborative study provides retailers with a framework for a balanced assortment.
Emphasis on fresh food was cited as biggest reason.
Most Americans with c-store experience see it as valuable to their future.
Product selection, reduced prices, and expanded loyalty programs are among key tools.
It must be part of the shopping experience for c-stores to remain relevant.
Gas is $2.50 or less at 56 percent of gas stations across the country.
Shoppers often browse online before heading in-store.