It really depends on where you live(not asking where you live im not a stalker)
The answer is true from my knowledge from last year it is true.
B. in order to back up the conclusions he publishes as a result of the experiment
-Archaebacteria, Eubacteria, Animalia, Protista, Fungi, Plantae
Both A and C would be out since mammals and species are not kingdoms
Now we would be left with both B and D after looking at both answer I choose B since Insectae is not a kingdom
Hope that helped
One way is by comparative anatomy. Comparing the similar bone structure of animals gives more proof of this theory. Also, the location of some animals compared to other animals of similar species is very convenient, and supports the theory of natural selection.