[单选题]
The coefficient of static and kineklj,b w vi7r og1.1/nob7m1mutic frictions betjsfaijb/+ u4( ween a 3.0-kg box and a desk are 0.40 and 0.30, respectively. What is the net force on the box when a 15 N horizontal force is applied to t fu4 j/ajb+(sihe box?