Answer :
C and D are definitely correct, but the other two depend on the group and how successful they are.
The correct answers are A.They keep herds of animals and B. Their food supply is more reliable than that of farmers
Explanation:
Hunter-gatherer was a type of human societies that survived based on gathering food such as fruits and vegetables and also hunting. These societies were dominant during the Paleolithic and Mesolithic when agriculture had not been invented. Instead, hunter-gatherers were mainly nomads and different to agricultural and herding societies they did not herd animals or grow plants which made food supply less stable and less reliable.
Considering this, the two statements that are not accurate or true about hunter-gatherers are "They keep herds of animals" because they hunted animals if needed but did not herd or grown animals and "heir food supply is more reliable than that of farmers" because by gathering and hunting food supply was more unstable.