C. Rhyolitic
Rhyolitic magma typically results in the greatest explosive events. Rhyolitic magma is characterized by its high viscosity and high silica content, which makes it very sticky and resistant to flow. When rhyolitic magma rises to the surface during volcanic eruptions, the high viscosity prevents the gases dissolved in the magma from escaping easily. As pressure builds up, the explosive release of gases and fragmented magma can lead to powerful and violent eruptions. These eruptions often produce volcanic ash, pyroclastic flows, and can generate volcanic plumes that reach high altitudes. In contrast, basaltic magma (A) is less viscous and typically results in more effusive eruptions, with lava flowing relatively smoothly. Andesitic magma (B) falls between basaltic and rhyolitic magma in terms of silica content and viscosity, resulting in eruptions that can vary in explosiveness. Pahoehoe (D) and aa (E) are terms used to describe different types of basaltic lava flows and do not specifically indicate the explosiveness of eruptions.