Kroger $($a grocery retailer$)$ decides to open stores in Canada, a country that they have never entered before. After conducting marketing research related to consumer behavior in the Canadian marketplace, marketing managers at Kroger concluded that they really don't have to change anything with their stores, such as the store layout or the products they offer. Based off of the information contained above, which of the following activities is$/$are Kroger engaging in$?$

Group of answer choices

Market development

Upward product line stretching

Downward product line stretching

Ethnographic segmentation

Undifferentiated marketing