Cross-contamination could be caused by carrying

A. drinking glasses by their rims.

B. a plate by its underside surface.

C. utensils by their handles.

D. wine glasses by their stems.

Answer:

A. drinking glasses by their rims.

Explanation:

Cross-contamination happens when harmful bacteria or other microorganisms are transferred from one object or surface to another. Option A: drinking glasses by their rims The rim is where people place their mouths, so touching it with hands (which may not be sterile) can easily transfer germs, making it a clear example of cross-contamination.

So, the act most likely to cause cross-contamination is touching the drinking rim, making A the correct choice.