[单选题]
A sailboat of mass m is moving wiq60v 7gxav,rdxwq ):* pj fn+ith a momentum p. How would you re )guhj l/lrpdes6(c4k v8rfur(87 ,pupresent its kinetic energyu7gl4k8cu/rr( 6pfe)8 d ,jl(vshrpu in terms of these two quantities?
A. $p^2/2m$
B. $\frac{1}{2} mp^2$
C. $mp$
D. $\frac{1}{2} mp$
