Final answer:
Using tampons is a risk factor for toxic shock syndrome (TSS) due to the Staphylococcus aureus toxin TSST-1. Improper tampon use can lead to infections that cause TSS, which is a serious condition.
Step-by-step explanation:
The correct answer is a) Using tampons. The nurse emphasizes that using tampons is a risk factor for toxic shock syndrome (TSS). TSS is a serious condition caused by the toxin TSST-1, associated with Staphylococcus aureus. Improper tampon use can lead to infections that result in TSS, as the toxin stimulates widespread T cell activation and excessive cytokine release, causing a systemic inflammatory response that can be fatal.