Answer:
C) 56 years old
Step-by-step explanation:
We have to consider what is the meaning of a long term goal; a long term goal is a goal that takes a long time to achieve, generally that long time is measured in years, e.g. graduate from college in 4 years, get a master's degree in two years.
Since the average retirement age in the US is between 60-62 years old, options A and D are not correct because you should be retired by then.
We have options B (16 years old) and C left. I rules out option B because no teenager is thinking about what he will be doing in 46 years. For a teenager, even a 46 year old person is very old, so they rarely consider what they will be doing in so many years.
That leaves us with option C, which represents a person that a few years away from retiring and should be planning his/her life after retirement.