Penningtons superstore, which specializes in plus-size fashions for women, wanted to determine if it should add a line of plus-size junior wear. the following statement reflects which step in the five-step marketing research approach? "to compare the effectiveness of offering products for the teenage market in our current stores versus opening separate stores targeted directly to this market, let's distribute questionnaires to current shoppers and solicit their opinions, set up some focus groups with plus-size teens, and locate any relevant secondary research."a) develop the research planb) take marketing actionsc) define the problemd) collect relevant datae) develop findings and recommendations