A restaurant announced that "the newly developed fume exhaust system has not yet completed a 6-month test inspection, but it has not failed so far, so the company decided to install it in the restaurant kitchen. After all, this system can solve the fume problem more effectively "The restaurant's chef said," We can't use an untested fume system, let's talk about it in six months. ". Which of the following best supports the chef's objections? ['New systems that can handle oil fume more effectively may also have new problems.', 'Although the new fume extraction system is more difficult to operate than before, it has some new capabilities.', 'The new fume exhaust system has a longer warranty period and is easy to maintain.', 'Many safety incidents are caused by fume exhaust systems.']