[单选题]
A spring is characterized by ap+gbkpe 0t*2 u sprin,wrnafj:,0w1qkcnw *g constant of 60 N/m. How much potential energy does it * wf,1nqwr,a:j0 wkcnstore, when stretched by 1.0 cm?
A. $3.0 \times 10^{-3} \; J$
B. $0.30 \; J$
C. $60 \; J$
D. $600 \; J$
