Considering the parable of the Persistent Widow (Luke 18:1-8), how does Jesus utilize this narrative to encourage a specific attitude among his followers?

A To demonstrate the importance of social status in gaining access to justice. B To illustrate the need for constant and unwavering prayer, even in the face of apparent unresponsiveness. C To suggest that legal systems are inherently corrupt and cannot be trusted. D To emphasize the futility of appealing to authority figures for assistance.