A serous membrane contains a superficial layer of epithelial tissue and a deeper layer of connective tissue. Thus, serous membranes are classified as:

a) avascular.

b) tissues.

c) organs.

d) amitotic.

The correct answer is option c) "organs".

Explanation:

One of the characteristics that define an organ is to have different layers of tissue, which fits the description that an organ must be comprised of at least two different kinds of tissue. The fact that a serous membrane contains superficial and deeper layers of epithelial and connective tissues, grants it the category of being an organ.