John Williamson installed a swimming pool in the backyard of the home he owns. While visiting him, Gina Arnold was invited to go swimming and was hurt while diving off the diving board. Arnold issued Williamson and recovered a judgment for $3,250. This judgment created
a) A lien on Williamson's property
b) A covenant on the property
c) A judgment lien on Williamson's property
d) A right of way on the property