Choose the correct statement from the following:
A. Charles Darwin travelled around the world in a ship called HMS Beagle
B. There has been gradual evolution of life forms
C. According to Darwin, fitness refers to physical fitness only
D. Fossils are remains of hard parts of life forms found in rocks
E. Hugo De Vries, a naturalist worked in Malay Archipelago.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.