When a poison such as cyanide blocks the electron transport chain during cellular respiration, glycolysis and the krebs cycle soon grind to halt as well. Which of the following is the best explanation for this? a) A high level of NADH is present in the cell. b) the uptake of oxygen stops because electrobn transport was inhibited. c) NAD+ and FAD are not available for glycolysis and the krebs cycle does not continue. d) electrons are no longer available from the electron transport chain to power glycolysis and the Krebs cycle. e) they run out of ATP I think it would be C, but I'm not very sure. Could someone confirm me my answer please?