Final answer:
The two most popular personal retirement plans are B) 401(k) and Social Security.
Step-by-step explanation:
The two most popular personal retirement plans are 401(k) and Social Security. A 401(k) is a retirement savings account that is sponsored by an employer. It allows employees to save and invest a portion of their paycheck before taxes are taken out. The money in a 401(k) grows tax-deferred, meaning you don't pay taxes on the earnings until you withdraw the money in retirement.
Whereas, a social Security is a retirement insurance where workers contribute a percentage of their income to receive income and health care benefits when they retire. The IRAs, Roth-IRAs, and other similar plans also exist but are typically less popular.