How Do Glycopeptide Drugs Differ from Beta- Lactam Drugs

How do glycopeptide drugs differ from beta- lactam drugs?

A) Glycopeptide drugs are easily absorbed across the intestines and therefore commonly used as oral preparations against systemic infections.
B) Glycopeptide drugs are often found to be ineffective due to antibiotic- resistance.
C) Glycopeptide drugs are broad- spectrum drugs, unlike beta- lactamases which are narrow- spectrum drugs.
D) Glycopeptide drugs do not have a beta- lactam ring, so they are not susceptible to beta- lactamases.
E) Glycopeptide drugs specifically target Gram- negative bacteria.