What is assurance?

Question $15$ options:

$1)$

A guarantee by the vendor of a system that it is secure for the purposes intended.

$2)$

A promise by an employee to follow the organization's security policy.

$3)$

A contract with a company to pay a certain amount of money if an undesirable event occurs.

$4)$

An evaluation of the design, development, and operation of a system with respect to its security properties.