Final answer:
The correct statement about Charophytes is that they share features with plants and are the closest relatives to land plants. Charophytes are part of green algae, living in wet habitats, and are not all microscopic or lacking in chlorophyll.
Step-by-step explanation:
The correct statement about Charophytes, a taxon of green algae, is C) Charophytes share features with plants and are considered the closest relatives to land plants. Charophytes are not exclusively marine; they are common in various wet habitats. Unlike the statement in option D, Charophytes do have chlorophyll and they are not all microscopic. The green algae, which include both Chlorophytes and Charophytes, have common characteristics with land plants, such as chlorophyll a and b, storage of carbohydrates as starch, and cellulose cell walls. This similarity supports the idea that Charophytes and land plants share a recent common ancestor. Among the green algae, it is the Charophytes which are considered to be the closest living relatives to land plants, and not all green algae are categorized as plants due to their diverse features.