Not all seniors are suitable to participate in investment activities. Most investment types require investors to have rich professional knowledge, but most seniors are lacking in this area, so that they can only be left to some liar's flicker. Compared with securities investment such as stock market, funds, etc. , it is easier for the elderly to invest in art. If they do not have sufficient discrimination ability, they will be deceived, thinking that they have encountered the beauty of "pick-up". Based on the above statement, which of the following can be derived? ['Some seniors have rich expertise and are suitable for participating in investment activities.', 'Some elderly people do not have enough discrimination ability, but they will also encounter the beauty of "pick-up".', 'Some seniors need sufficient discrimination if they do not want to be deceived.', 'Elderly people are not suitable to participate in investment activities, whether it is the stock market, funds or art investment.']