Which of the following explains how this affects the cilia? a. the thick mucous just suffocates the cells and kills them off one by one b. the thick mucous traps other cells, so they stick together making infections more likely c. the thick mucous pulls the infection into the cells causing damage. d. the mucous is so thick that the cilia can’t move and if it can’t move it can’t clear out bacteria and infections are more likely to occur