Which of the following best describes a$401($k$)$ plan?

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Part $1$

A$.$

It is a retirement account that is not subject to taxation.

B$.$

It is an emergency savings account that can be used at any time without penalty.

C$.$

It is a retirement savings plan in which the employee contributes into a retirement$$ account, and the employer may match a portion of the$$ employee's contribution to the account.

D$.$

It is a loan provided by the federal government to$$ employers, but can only be used to fund$$ employees' retirements.

E$.$

It is a retirement account that can only be utilized at retirement$$ age, and$$ cannot, under any$$ circumstances, be used before the age of $591/2$