A Group of Scientists Wants to Design a Project to Determine

A group of scientists wants to design a project to determine the cause or causes of latitudinal patterns in species diversity.Which is not a correct statement regarding possible problems in the design of their project?

A) It is difficult to find examples of latitudinal patterns of species diversity on Earth.
B) It is difficult to isolate all climatic factors that impact species diversity.
C) It is difficult or impossible to isolate all factors causing species diversity.
D) It is difficult or impossible to conduct experiments over large spatial scales.
E) Latitudinal patterns develop over long time spans, which are difficult to measure.