Judging from the fourth paragraph, what does "junk" mean

A．how to get food and drinks in the camping area
B．what kind of cooking equipment should a camper take
C．what kind of food a camper should bring
D．what kind of campground a camper should select when cooking and drinking

A．wear cotton undershirts
B．throw away some unnecessary clothes
C．do not need any kind of tents
D．wear down-filled jackets