Multi-select problem: How does the next paragraph end?

How to be happier by showing gratitude
Remember to say thank you to everyone who performs a small courtesy like opening a door.
The more opportunities you find to say thank you, the better you will feel about your life at the end of the day.
Smile at every cashier, bank teller and bus boy and say " thank you.

Pick from: (a). " treat people with grace, even when they start to act self-deprecating or unprofessional. It will make people feel better about themselves and even help them feel more loved. (b). " the effects of gratitude are contagious. When you show it to others, they will immediately mirror it back to you. (c). " send gratitude to every individual who drops money on a bus stop. ' thank you kindly' to all the people who accept your calls, texts and email when an inconvenience arises. (d). " you will also notice that some jobs won't give you any opportunities to be happier. Therefore, show others that you are grateful and demonstrate how appreciative you are.
(b).