which of the following statements is true about memory cells?check all that apply.1.Memory cells are mature monocytes2.Memory cells respond to antigens more rapidly than naive T cells.3. Upon preexposure to a pathogen, memory cells engage in the T cell recall response, destroying the pathogen quickly.4The action of memory cells is the reason why we can get some diseases more than once.5. There are far fewer memory cells than naive T cells.