In the weather forecast for a certain day in January in Shaanxi Province, the lowest temperature in Yan'an City is -6℃, and the lowest temperature in Xi'an City is 2℃. On this day, the lowest temperature in Yan'an City

To find out how much lower the minimum temperature in Yan'an City is than the minimum temperature in Xi'an City, we can use the minimum temperature in Xi'an City - the minimum temperature in Yan'an City.

That is, 2-(-6)=2+6=8.

So choose A.