Passage: "The 'Lamarckian inheritance' theory, proposed by Jean-Baptiste Lamarck, suggested that organisms could pass on traits acquired during their lifetime to their offspring. For example, a giraffe stretching its neck to reach high leaves would, over generations, produce offspring with longer necks. This theory, however, was largely discredited by the rise of Mendelian genetics and the discovery of DNA, which established that inherited traits are encoded in genes and are not typically influenced by an individual's somatic experiences. While some epigenetic phenomena, where environmental factors can influence gene expression across generations without altering the underlying DNA sequence, bear a superficial resemblance to Lamarckism, they fundamentally differ in mechanism and scope. True Lamarckian inheritance, as originally conceived, remains outside the accepted framework of modern biology." The author's discussion of epigenetic phenomena primarily serves to:

1. AArgue for a complete re-evaluation of Lamarck's original work.
2. BSuggest that Lamarckian inheritance may be partially true.
3. CIntroduce a modern theory that completely validates Lamarck's ideas.
4. DProvide a nuanced distinction between a discredited theory and related modern concepts.