What is the most logical next event?

How to ask a cute stranger out
Smile.
Smiling at a person shows that you are friendly, non-threatening, and interested in them. If the person smiles back at you, it is a good indication that they are thinking positively of you.

Choose your answer from:
(a). Notice the difference between a " real " and a " fake " smile by noticing if the skin at the outer corners of their eyes creases when they smile. These creases indicate that the person is genuinely happy.
(b). If the person does not smile back in return, this can communicate that you haven't appreciated their words and they haven't taken the time to reciprocate. This is important for building a friendship since a smile is the most friendly way to start a conversation.
(c). While smiling is a subtle way to show interest, a person who is shy is more likely to smile. If the person appears nervous or seems as if they don't feel comfortable with having you smile at them, this could indicate that they are shy and don't want to be near you.
(d). This smiling sends the message that you are willing to talk to them about something important. Smiling and greeting the person shows them that you are just as happy not only to talk to them, but that you are excited to see them and interested in talking with them.
(a).