[单选题]
Consider a particle of dd9.p0*i ukqf+q-lfv: bgm +t 1qi5iqmefoipg/ iqh-t7l0 ;r hs (i4f,ass $m$ and rest mass $m_0$. Which of the following is the correct expression for the kinetic energy of such a particle?
A. $\frac{1}{2} m_0 v^2$
B. $\frac{1}{2} m v^2$
C. $m c^2 - m_0 c^2$
D. $\frac{1}{2}(mc^2 - m_0 c^2)$