Which of the following gram-positive cocci are known to ferment glucose?

Staphylococci are a group of gram-positive cocci that have the capability to ferment glucose. They utilize glucose as a carbon source, producing energy through fermentation pathways. This ability is particularly important for their growth and survival in various environments, including human hosts where they can contribute to infections.

Micrococci, on the other hand, typically do not ferment glucose. They are more aerobic and tend to utilize oxygen for metabolic processes rather than relying on fermentation. This distinction is critical, as the metabolic pathways they employ influence their roles in both health and disease.

Thus, staphylococci's ability to ferment glucose makes them the correct choice in this context.