[Solved] According to Piaget, which statement is true regarding stages of thinking? A) Sensorimotor and preoperational thinking must be completed before the concrete operational stage, but not before formal operational thinking. B) Sensorimotor and preoperational thinking must be completed before the formal operational stage, but not before concrete operational thinking. C) Thinking alternates between stages throughout development. D) All stages must be accomplished in the correct order. Gymnosperms: A group of seed-producing plants that includes conifers, cycads, Ginkgo, and gnetophytes, distinguished by their naked seeds not enclosed in an ovary. Rhizoids: Hair-like structures on the surface of plants, fungi, and algae that absorb water and nutrients and anchor the organism to the substrate. Mosses: Small, non-vascular plants that typically form dense green clumps or mats, often in moist or shady locations. Gametophyte: The sexual phase in the life cycle of plants and algae that produces gametes through mitosis.