It is a wise father that knows his own child, but today a man can boost his paternal (fatherly) wisdom—or at least confirm that he’s the kid’s dad.All he needs to do is shell out $30 for a paternity testing kit (PTK) at his local drugstore—and another $120 to get the results.More than 60,000 people have purchased the PTKs since they first become available without prescriptions last year, according to Doug Fogg, chief operating officer of Identigene, which makes the over-the-counter kits.More than two dozen companies sell DNA tests directly to the public, ranging in price from a few hundred dollars to more than $2,500.阅读题1:In paragraphs 1 and 2, the text shows PTK’s___________.
easy availability
flexibility in pricing
successful promotion
popularity with households