Environmental scientists use gel electrophoresis to detect the presence of carp DNA. Option D is correct
Natural resource agencies have established surveillance programs which use environmental DNA for the early detection of bighead carp Hypophthalmichthys nobilis and silver carp Hypophthalmichthys molitrix before they establish populations within the Great Lakes. This molecular monitoring technique must be highly accurate and precise in order to achieve a confident interpretation as well as efficient, both in detection threshold and cost