Most upset customers will calm down if you offer a sincere apology. (True or False)?

true with a good attitude 

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First of all customers expections is very nececery to understand and way to good relations with customers because one learns the customers expections from the company

True. A heart felt apology will not only clam down most upset cutomers but may pave way to good relations with customers because one learns the customers expections from the company.

True. A sincere apology with an assurance that you can help fix the issue. It's not only to make the customers calm down but you can also build trust with them. 

The answer is True,

Most customers want you to acknowledge that they've been disappointed and want you to express some regret.

Thanks for the invite ............................ true

itis very true.A sincere apology from our side will help the customer to being normal.

Absolutely True. Because everyone respects good manners.