Answer:
Option A , A group of wealthy businessmen
Step-by-step explanation:
Group of wealthy businessmen is least concerned about a genetically modified crop as he is able to afford GM crops easily unlike a poor person. Also, there is no research interest among the members of this group for GM crops.
All medical professional and biology researchers are concerned about GM food as it affects the ecosystem in some or the other way.
A poor person is also concerned about GM foods because he/she is not able to afford GM crops.
Hence, option A is correct.