Shop assistant: What do you have in mind 　　Customer :I’m thinking about jewelry or something valuable. 　　Shop assistant: We’ve got beautiful jewelry here. If you’re interested， ________.

A．People tend to be optimistic even in crisis.
B．Optimists enjoy life better than pessimists.
C．Being optimistic has both benefits and risks.
D．Optimism is what keeps us going forward.

A．adjust our goals in life
B．learn to release bad mood
C．avoid being overoptimistic
D．maintain a positive attitude