Amino acid supplements are advertised to enhance performance in various groups of athletes. Based on the available research data, which of the following statements is FALSE concerning their effectiveness in this regard?a) arginine and ornithine are used to stimulate the release of human growth hormone, but research is generally not supportive of an ergogenic effectb) L-tryptophan has been shown to enhance performance in one study, but more recent data with better study designs have shown that L-tryptophan is not an effective ergogenicc) some well controlled research with aspartates has shown some possible beneficial effects, but more research is needed for confirmationd) BCAA supplementation in theorized to be beneficial in prolonged endurance events, but more research is needed for confirmation, especially with chronic supplementatione) Although not an essential amino acid, research conducted at Old Dominion University has shown inosine to be an effective ergogenic for aerobic endurance events