What is the purpose of a control sample that is known to be from bighead carp in eDNA surveillance for bighead carp?
A. To use as a negative control to compare with the markers of
known fragment sizes
B. To use as a positive control to compare with the markers of known
fragment sizes
C. To use as a positive control to see if there are bighead carp
present in the area
D. To use as a negative control to see if there are bighead carp
present in the area