Experimenters have discovered that
salamanders are many more times more sensitive to magnetic cues than homing pigeons, and use the magnetic field of the Earth to find their way from place to place.
(A) salamanders are many
more times more sensitive to magnetic cues than homing pigeons and use;
more time more is awkward construction. comparison is not clear - salamanders are more sensitive to magnetic cues than pigeons. Is salamander sensitive to pigeon as well, probably not(B) salamanders are many times more sensitive to magnetic cues than homing pigeons are and use;
comparison is clear.(C) salamanders are sensitive to magnetic cues,
many more times so than homing pigeons are, using;
we have better options with simpler forms. It changes the meaning as well, are salamanders are sensitive only using magnetic field.(D) the sensitivity of salamanders to magnetic cues is many times that of homing pigeons, and
they use;
they does not have an antecedent. (E) the sensitivity of salamanders to magnetic cues is many times that of homing pigeons,
using;
who is using the magnetic field, not sensitivity.