The bonds that link glucose units into polysaccharides are not all the same. Which of the following is true of these bonds? a. Humans always require help from bacteria to break starch bonds. b. The bonds of starch are found in plants and are easily broken by human enzymes. c. The bonds of glycogen are found in animals and cannot be broken by human enzymes. d. The bonds of cellulose are found in plants and are easily broken by human enzymes. e. Human enzymes can never break the link between glucose units in polysaccharides.