Consider the following statements and choose the correct answer:
1. All living things are composed of cells and their products
2. All cells arise from pre-existing cells
3. All cells are basically alike in chemical composition and metabolic activities
4. The function of an organism as a whole is the outcome of the activities and interactions of the constituent cells

A. Only 1 and 2 are correct

B. Only 1, 2 and 4 are correct

C. Only 2 and 4 are correct

D. 1, 2, 3 and 4 are correct

Answer: Option D