The correct option is D All of these
Areolar tissue also called loose connective tissue widely spread throughout the body. It contains all three types of fibers (collagen, elastin, and reticular) with much ground substance and most common cell type is the fibroblast (cells that produce and secrete fibres), but areolar connective tissue also contains macrophages, mast cells, and white blood cells.
It consists of a meshwork of collagen, elastic tissue, and reticular fibres - with many connective tissue cells in between the meshwork of fibres.
The fibres that form the mesh structure of areolar tissue include:
Collagen fibres, elastic fibres, reticular fibres.
The different types of cells embedded within the areolar tissue include:
Fibroblasts, plasma cells, adipocytes, mast cells and macrophages.
So the answer 'All of these'.