You want to assess the variation in hydro bills within rural Ontario households. To do this, you use records provided to you by Hydro One-the electricity transmission and distribution utility serving the province-to randomly assess 100 rural households in the province. The data gathered through this investigation are then used to develop conclusions about the spending of all rural households in Ontario on their hydro needs. This study is an example of the use of: OA) descriptive statistics OB) nonparametric statistics OC) inferential statistics OD) research statistics OE) A and B are true