Answer:
"Be all you can be is an example" of slogan or saying.
Step-by-step explanation:
A slogan ir a saying is a phrase which is short and easy to remember. It is often used in advertisements.
For example
You are launching a protein powder brand where you kept the slogan as "Be all you can be" which depicts that the protein powder is capable of everything you need in your body.
Other Options are INCORRECT
A mission statement is something which describes the agenda, ethics, values of the orgaization which is Incorrect.
A story, legend or myth can't be described in a short phrase. Therefore, Incorrect.
A role modeling is an inspiring statement which is alrady present in ourself. But, here "Be all you can be" depicts that it is something that is yet to be achived. Therefore, Incorrect.