6) Jane wants to buy a photocopier. 'l'he salesperson has the following information on three models- 11 all three are used, a specic job is completed in 50 minutes. If copier A operates for 20 minutes and copier B operates for 50 minutes; one-half of the job is completed- If copier B operates for 30 minutes and copier C operates for 80 minutes, three-fifths of the job is completed. Which is the fastest copier, and how long does it take this copier to complete the entire job working alone? A) A is fastest; 120 minutes B) C is fastest; 120 minutes C) C is fastest; 100 minutes D) B is fastest; 100 minutes