11. All of these contribute directly to fertile topsoil except a. bedrock chemical reactions.
b. minerals supplied by rock particles.
c. decomposition action of fungi and bacteria.
d. earthworms' breaking down the soil.

11. a nursing assistant works in a home healthcare setting with a patient. during a procedure, a blood spill occurs. the nursing assistant put on her ppe and gets some paper towels. she removes the visible blood by blotting it up with the paper towels. next, she should place the paper towels in the trash. wash her hands using proper technique get a disposable mop. place the paper towels in a biohazard bag