Answer:
The lipid bilayer.
Explanation:
It is a thin polar membrane made of two layers of lipid molecules. These membranes are flat sheets that form a continuous barrier around all cells.
I believe the answer is B., Hopefully I'm correct!
I think some factors that influence rabbit reproduction is enough food, healthy rabbits, lots and lots of space for them to populate, and very little predators. This should help I'm not exactly sure what you are looking for though sorry. :^)