10 points again, last time!?

Question

how should these sentences be written or not changed. commas and everything grammar rule

-When a person says something tactless is unintentionally insulting.

-An example of discriminating is a shop owner after he refuses to sell to foreigners.

Answer 1

When a person is tactless, they are unintentionally insulting.

-An example of discrimination is a shop owner, who refuses to sell to foreigners

Answer 2

-A tactless person says something unintentionally insulting.

-A shop owner refusing to sell to foreigners is an example of discrimination.

Answer 3

When a person says something tactless it is (or it's) unintentionally insulting.

A shop owner refusing to sell to foreigners is an example of discrimination.

Starting a sentence with "An example" is weird, teachers always push students away from that

Answer 4

When a person says something unintentionally insulting, it's tactless.

A shop keeper refusing to sell to foreigners, is an example of discrimination.