Journalist: Many people object to mandatory retirement at age 65 as being arbitrary, arguing that people over 65 make useful contributions. However, if those who reach 65 are permitted to continue working indefinitely, we will face unacceptable outcomes. First, young people entering the job market will not be able to obtain decent jobs in the professions for which they were trained, resulting in widespread dissatisfaction among the young. Second, it is not fair for those who have worked 40 or more years to deprive others of opportunities. Therefore, mandatory retirement should be retained.

Question: The journalist’s argument depends on assuming which one of the following?
Options:
A. Anyone who has worked 40 years is at least 65 years old.
B. All young people entering the job market are highly trained professionals.
C. It is unfair for a person not to get a job in the profession for which that person was trained.
D. If people are forced to retire at age 65, there will be much dissatisfaction among at least some older people.
E. If retirement ceases to be mandatory at age 65, at least some people will choose to work past age 65.
Answer: "E"