Your cousin's friend enjoys trading stocks. He does it based on some confidential information that he overhears at the company he is working for. He said to your cousin numerous times that the information he overhears is not known by the general public. At the same time, your cousin's friend complains over and over that he just can't seem to be able to make any profit by trading his stock shares. This information allows you to safely say that the stock market has ___ form of market efficiency.

Group of answer choices

weak or semi-strong

no more than weak

semi-strong or strong

more than semi-strong

either weak, semi-strong, or strong

weak or strong