What is most closely denoted by the term food deserts in the passage below (paragraph 7)?

We had plans to help bring greengrocers into urban neighborhoods and rural areas known as “food deserts,” to push for more accurate nutritional information on food packaging, and to redesign the aging food pyramid to be more accessible and in line with current research on nutrition.
Answer choices for the above question

A. regions of the globe where there is little water to grow food

B. areas where there is little access to fresh or natural food

C. cookies, pie, ice cream, churros, chocolate, fruit, cake, creme brûlée, marzipan, gelato and candy corn

D. areas where it is not worthwhile for businesses to sell food