16. A magnetic field is directed into the page, as shown by the "X" symbols in the small circles. A charged particle, moving in the plane of the page, follows a clockwise spiral of decreasing radius as shown. A reasonable explanation is for this oath is: (Note: each answer below has two parts. "Showing your work" requires an explanation for each of the two parts.) A) the charge is negative and speeding up B) the charge is negative and B is increasing C) the charge is positive and slowing down D) the charge is positive and B is increasing E) the charge is positive and speeding up particle