When buying flooring, consumers are very concerned about the odor emitted by the floor, because the pungent odor of the floor is often a manifestation of toxic and harmful substances exceeding the standard. Recently, it is said that the fragrance green floor has won many consumers Favored. The salesperson claims that the scent emitted from the floor can sterilize and remove the odor in the air. When the salesperson sells this product, they often bring several different floors to make consumers interested in smelling it. And pointed out that the floor with a fragrant smell is the fragrance and environmental protection floor. Which of the following, if true, would most weaken a salesperson's perspective? ['The odor is not the only criterion for judging whether the floor is environmentally friendly. In addition to smell, consumers are more concerned about the content of organic volatiles in the floor.', 'In fact, due to the odor of the wood itself and the limitations of the manufacturing process, the floor is more or less irritating.', 'So far, the relevant state departments have not issued a special standard for fragrance of environmentally friendly flooring. The so-called "fragrance" is just a concept of manufacturer hype.', 'Inspection proves that many manufacturers add chemical additives such as flavors to the floor to cover or neutralize irritating odors.']