Identify which following sentence contains weak and hedging expressions:

A、Byanalogy,onecanwalkfromonepointinhillycountrytoanotherbyapathwhichisalwaysleveloruphill,andyetastraightlinebetweenthepointswouldcrossavalley.;
B、Caseshavebeenreportedwherethiswouldhavebeentheonlypossiblemethodoftransmission.;
C、Nowadaystheurinarysymptomsseemtobeofalesserorder.;
D、Nowadaystheurinarysymptomsareofalesserorder.