A) leave it there as it was and walk away
B) remove the stamps and destroy the envelope.
C) open the envelope, find out who has dropped it by mistake, and send it to him if possible.
D) post it at the nearest letter box.
A) leave it there as it was and walk away
B) remove the stamps and destroy the envelope.
C) open the envelope, find out who has dropped it by mistake, and send it to him if possible.
D) post it at the nearest letter box.