This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to find great companies to invest in
Stay within your circle of competence.
If you have a field of expertise, you may be best able to identify quality within that area. Experience can provide you with the insights you need to make more informed choices.

OPTIONS: a). If you have a friend who is a successful entrepreneur, for example, you can provide your knowledge of where someone's business stands. Professional analysts communicate clearly with their clients, and they rely on penetrating techniques to convince their clients of success in a variety of situations.; b). Understand you can still work around your industry with prestige if you at least associate with and make a good impression on people with several jobs if those positions title you as top in that field. But if you focus on certain openings that have specialized experience and diverse skill sets, you can do well.; c). Make notes on company websites or online directories. With time on your hands, learn to review company profiles to see which companies offer the best service.; d). For example, if you work in retail, you may be better positioned to determine if you should invest in companies like walmart, target, or best buy, than you are in evaluating the latest bio-tech company. Having competence in a certain area doesn't have to come from workplace experience.;
The answer is:
d).