Which of the following bacteria is commonly found in humans, especially near/in the nose?

Staphylococcus aureus is commonly found in humans, particularly in the nasal passages and on the skin. This bacteria plays a significant role in normal human flora but can also become pathogenic, leading to various infections such as skin infections, pneumonia, and food poisoning under certain conditions. Its presence in the nasal region is well-documented, highlighting its ability to colonize mucosal surfaces without causing illness in healthy individuals.

The other options represent different bacteria that do not primarily colonize the nasal passages. Bacillus cereus is typically associated with foodborne illnesses and is found in certain food products rather than being a normal part of human flora. Clostridium botulinum, known for causing botulism from improperly preserved foods, is not typically found in humans as a normal flora organism. Clostridium perfringens is associated with food poisoning and gas gangrene but does not have a known association with the nasal cavity. Thus, Staphylococcus aureus stands out as the correct answer due to its prevalence in the nasal area of humans.