Final answer:
The monthly disability benefits of Social Security are impacted by the individual's age, disability severity, and work history, with all factors playing a role in the calculation of the benefit amount.
Step-by-step explanation:
The amount of monthly disability benefits payable under Social Security can be influenced by a variety of factors. Specifically, these benefits may be affected by the individual's age, the severity of their disability, and their work history. Each one of these aspects plays a critical role in determining the benefit amount.
Firstly, the work history of the individual is important because the benefits are partly based on their lifetime earnings. Secondly, the age at which the individual becomes disabled may influence the benefit amounts, as earlier disabilities might result in longer payment periods. Lastly, the severity of the disability is also considered to ensure that those with more severe disabilities may receive adequate support.
Therefore, the correct answer to the question is "4) All of the above" as all these factors - age, severity of the disability, and work history - collectively determine the disability benefit amount received under Social Security.