$1$

A recent Brookstone ad features a "motorized grill brush with steam cleaning power!" as an ideal Father's Day gift with the pitch, "The ultimate power tool for your grill." The Stainless Steel Steam Cleaning Grill Brush uses heat from your grill to make steam, so cleaning the barbecue is a breeze. Just fill the reservoir handle with water and flip a switch. Water flows into the steel bristles. When the water hits the hot grill, it turns to steam and instantly loosens up grease and charred foods. The powerful combination of steel bristles and steam gives your grill a clean$-$as$-$new appearance that's also safer for food preparation. Works on virtually all charcoal and propane barbecues with cast iron, stainless steel or ceramic grills. This is an example of a$($n$)$

a$.$ noncomparative ad

b$.$ two$-$sided argument

c$.$ comparative ad

d$.$ one$-$sided argument