Final answer:
The appropriate action when on patrol and noticing someone who appears to be pregnant is to simply greet her and continue on patrol, avoiding assumptions or personal inquiries.
Step-by-step explanation:
When on patrol and encountering a young lady who appears to be pregnant, the most professional and respectful action to take would be c) Greet her and continue on your patrol. It's important not to make assumptions about someone's physical appearance or personal life, as it can be invasive and inappropriate. Congratulating someone on a pregnancy, inquiring about personal details, or asking about their pregnancy without them bringing it up first can be considered rude and insensitive. The best practice is to maintain a respectful distance and privacy unless the individual engages in conversation and shares information on their own accord.