**Introduction:**
Volcanoes are geological features that occur when magma, gas, and other materials from the Earth's interior are released through openings in the Earth's surface. They are typically found in specific geological locations that are associated with tectonic plate boundaries or areas of geological activity. In this context, we will explore the likelihood of the occurrence of volcanoes in the given geological locations.

**Coastal Mountain Ranges:**
Coastal mountain ranges are formed by the collision or subduction of tectonic plates. These tectonic activities create intense pressure and heat, leading to the melting of rocks and the formation of magma. As the magma rises through cracks and fissures in the Earth's crust, it can erupt onto the surface and form volcanoes. Notable examples of volcanic activity in coastal mountain ranges include the Cascade Range in North America and the Andes in South America.

**Off-Shore Islands:**
Off-shore islands, especially those located near tectonic plate boundaries, are commonly associated with volcanic activity. These islands are often formed by volcanic eruptions that occur underwater. As the magma rises and reaches the surface, it cools and solidifies, eventually forming new landmasses. Well-known examples of volcanic islands include the Hawaiian Islands, which were formed by a hotspot beneath the Pacific Plate.

**Midst of Deep Ocean Beds:**
Deep ocean beds are generally associated with tectonic plate boundaries, which are hotspots for volcanic activity. Underwater volcanic eruptions can occur along mid-ocean ridges, where tectonic plates are diverging, or at subduction zones, where one tectonic plate is being forced beneath another. These volcanic activities contribute to the formation of seamounts and underwater volcanoes. One such example is the Axial Seamount located off the coast of Oregon in the United States.

**Conclusion:**
Based on the geological processes and locations described, it is evident that volcanic activity is likely to occur in all three given geological locations: coastal mountain ranges, off-shore islands, and the midst of deep ocean beds. These areas are associated with tectonic plate boundaries, where the conditions for magma generation and eruption are favorable. Therefore, the correct answer is option 'D': All of the above.