ABCD is a square. Let E be a point on the segment BC and F be a point on the segment ED. If DF \equal{} BF and EF \equal{} BE, then ∠DFA is<spanclass=′latex−bold′>(A)</span>45∘<spanclass=′latex−bold′>(B)</span>60∘<spanclass=′latex−bold′>(C)</span>75∘<spanclass=′latex−bold′>(D)</span>80∘<spanclass=′latex−bold′>(E)</span>85∘