Lashaun decided to create a table to compare the number of students who arrive to school by car to the number who arrive by bus. If a two-way table is made to represent the data, which could be the row and column headings? column: boy, girl; row: arrive by car, arrive by bus
column: boy, girl; row: arrive by car, total students in class
column: boy, girl; row: arrive by bus, total students in class
column: boy, girl; row: total students in class, total who arrive by car or bus