Which are examples of steroids? testosterone and trans fats cholesterol and phospholipids cholesterol and vitamin d estrogen and phospholipids description?

Option C, cholesterol and vitamin d

Explanation:

Steroids are artificially produced hormone that acts as a natural hormone. These steroids are form of lipids as they are  

a)Hydrophobic

b)Insoluble in water

Cholesterol and vitamin D are the most common steroids. Cholesterol is synthesized in the liver and it is precursor to vitamin D and other steroid hormones like estrogen, testosterone, and progesterone.  

Thus, option C is correct

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.

b is dominant over the allele for the white fur.