Final answer:
The Golgi apparatus is the organelle that produces and modifies polysaccharides destined for secretion. option c.
Step-by-step explanation:
The organelle responsible for producing and modifying polysaccharides that will be secreted is the Golgi apparatus. In plant cells, the Golgi apparatus plays a pivotal role in synthesizing polysaccharides, some of which are integrated into the cell wall, while others are utilized in various parts of the cell. The Golgi apparatus receives proteins and other products from the rough Endoplasmic Reticulum (ER), then organizes, modifies, packages, and tags them, preparing some for transport to other areas of the cell and some for secretion outside the cell through exocytosis. The Golgi apparatus also produces new organelles called lysosomes, which contain enzymes and are involved in intracellular digestion.