Which group of animals could be correctly classified as endothermic?

Question 11 options:

robin, squirrels, mice

bears, snakes, wolves

frogs, lizards, snakes

groundhogs, hawks, crab

Only birds and mammals are extant universally endothermic groups of animals. Certain lamnid sharks, tuna and billfishes are also endothermic. In common parlance, endotherms are characterized as "warm-blooded".

d is your answer if im not mistaking