In the standard (x,y) coordinate plane, the triangle with vertices at (0,0), (0,k), and (2,m), where m is constant, changes shape as k changes. What happens to the triangle's area, expressed in square coordinate units, as k increase starting from 2?
F. The area increases as k increases.
G. The area decreases as k increases.
H. The area always equals 2.
J. The area always equals m.
K. The area always equals 2m.