Please choose the correct ending to complete the given sentence: Health: [header] How to be happier by showing gratitude [title] Remember to say thank you to everyone who performs a small courtesy like opening a door. [step] The more opportunities you find to say thank you, the better you will feel about your life at the end of the day. [title] Smile at every cashier, bank teller and bus boy and say " thank you.

Ending1: [step] " 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. Ending2: [step] " the effects of gratitude are contagious. When you show it to others, they will immediately mirror it back to you. Ending3: [step] " send gratitude to every individual who drops money on a bus stop. [title] ' thank you kindly' to all the people who accept your calls, texts and email when an inconvenience arises. Ending4: [step] " 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.

Answer format: ending1/ending2/ending3/ending4