Answer:
D. Ribosomes
Explanation:
Rough endoplasmic reticulum (RER) bears ribosomes on it surface which give it granular apperance and they are the site of protein synthesis.
The higher temperature would be 100c since when you use the fromulas to convert them the other two are lower.
100F = 37.8 C and 310.7K.
100C = 237.6F and 373K.
100K = -173C and -253.8F