24 According to the endosymbiotic theory, it was adaptive for the larger host cell to keep the engulfed cell alive rather than digesting it as food because_________. (A)the engulfed cell provided the host cell with adenosine triphosphate (ATP) (B)the engulfed cell provided the host cell with carbon dioxide (C) the engulfed cell allowed the host cell to metabolize glucose (D) the host cell was able to survive anaerobic conditions with the engulfed cell alive