Final answer:
The ratio that reflects the relationship between sales generated and total assets invested for Kelso's Pharmacy is the asset turnover ratio, which is answer choice d.
Step-by-step explanation:
The relationship between the sales generated and the total assets invested is represented by the asset turnover ratio. This ratio is calculated by dividing the sales or revenue of a company by its total assets. Given that Kelso's Pharmacy generates $2 in sales for every $1 invested in total assets, the ratio that would reflect this relationship is the asset turnover ratio. Therefore, the correct answer is d. Asset turnover ratio.