In the exploration of evolutionary relationships between species, gel electrophoresis serves as a valuable tool. The diagram below presents the outcomes of gel electrophoresis experiments involving four animal species labeled A, B, C, and D.
Which species shares the highest degree of DNA similarity with species A?

Species A
Species B
Species C
Species D
Among the analyzed species, the comparison reveals that species C exhibits a higher band. In contrast, species B and D each only share 1 band with species A. Hence, the correct answer is option 3.