Which of the following statements is true?

A. Endotoxins produce varied effects such as neurotoxic or protein inhibition effects, but exotoxins produced generalized irritation and inflammation of epithelial surfaces
B. Endotoxins are found attached to the cell wall of certain bacteria, but exotoxins are secreted toxins that may exhibit their effect independently of the presence of the bacteria
C. Endotoxins include the neurotoxins of botulism and tetanus, while exotoxins include the enterotoxin of Staphylococcus aureus
D. More than one of the above statements is true
E. None of the above is true