Which of the following medications are parenteral anti-diabetic medications used to treat clients with type 2 diabetes mellitus that are administered via the subcutaneous route? (Select All That Apply.).

A. NPH insulin is an intermediate-acting insulin that is administered via the subcutaneous route to manage blood sugar levels in clients with diabetes. B. Regular insulin is a short-acting insulin that can be administered subcutaneously to control blood glucose levels in clients with type 2 diabetes. C. This is an oral medication, not a parenteral (injected) medication. It is an oral sulfonylurea used to manage blood glucose in type 2 diabetes. D. Metformin is also an oral medication used to treat type 2 diabetes and is not administered subcutaneously.