Final answer:
An intradermal injection is administered between the layers of skin, and oral administration is typically the most convenient for home antimicrobial treatment. When an individual bleeds from a cut, they have penetrated the papillary dermis layer of the skin.
Step-by-step explanation:
A intradermal injection is given between the layers of skin via a syringe. The correct answer is d. intradermal.
In the context of question 4, the most appropriate and convenient route of administration for home administration of an antimicrobial to treat a systemic infection would be oral administration, option A. This method is generally the easiest and most convenient for patients to manage on their own.
Referring to question 17, if an individual notices a small amount of blood after cutting themselves with a sharp knife, the layer of skin that has been cut into is the papillary dermis, option c. This layer contains the blood vessels which, when cut, will lead to bleeding.