Cohesion and coherence are fundamental properties of a text that ensure it functions as a unified whole. Analyze the following statements regarding these concepts:

I- Cohesion refers to the linguistic links and cues within a text (such as pronouns, conjunctions, and ellipsis) that connect one part of the sentence or text to another.
II- Coherence is primarily concerned with the underlying semantic logic and the “make-sense-ness” of a text, often relying on the reader's world knowledge and the context of situation.
III- The use of conjunctions (e.g., however, therefore) is a mechanism of lexical cohesion, whereas the use of synonyms and superordinates represents grammatical cohesion.
IV- A text may possess high grammatical cohesion but lack coherence if the linked sentences do not follow a logical progression of ideas or fail to relate to a central theme.

Which of the statements above are CORRECT?