After four​ hours, a server checked the holding temperature of the cold tuna salad in the buffet. it was 71degrees°f ​(22degrees°​c). what should be done with the tuna​ salad?
a. put it in a cooler to lower the temperature to 41degrees°f ​(5degrees°​c).
b. heat it to 135degrees°f ​(57degrees°​c), then cool it to 41degrees°f ​(5degrees°​c).
c. throw it out.
d. serve it.