The diagram below shows the gel electrophoresis results of an eDNA study.
According to the results shown, at which test sites were bighead carp found?
Calumet
Negative
North Shore North Shore
1
2
Chicago
1
Chicago
2
Calumet
site 1
Positive
control
Bighead carp
DNA marker
1300 bp)
O
O
A. Only Calumet sitening
B. Both North Shore sites 1 and 2
C. Both Chicago sites 1 and 2
D. Only Calumet site 2
O
O