If a River Is Constantly Moving and Sense Experience Is

Multiple Choice

If a river is constantly moving and sense experience is veridical, then everything is in flux. If sense experience is veridical, but not our only means of knowledge, then not everything is in flux. So, if a river is constantly moving and sense experience is veridical, then the senses are our only means of knowledge.
-Which of the following propositions is an immediate (one-step) consequence in PL of the given premises?

A) F ⊃ ∼(V • ∼O)
B) ∼∼F ⊃ ∼(V • ∼O)
C) ∼∼(V • ∼O) ⊃ ∼F
D) All of the above
E) Options B and C, but not option A