C, Because Supreme Court justices serve for life, they don't have to worry about political pressures of making decisions based on keeping their jobs.
This piece of evidence does not support the claim that Supreme Court justices shouldn't serve for life. In fact, it suggests a positive aspect of lifetime tenure, indicating that it allows justices to make decisions without political pressure. The other two options point out potential issues related to aging justices and their ability to adapt to contemporary societal changes, which are more relevant to the argument against lifetime tenure.