The correct answer is C. Sandstone.
Sandstone is a sedimentary rock composed of sand-sized grains of mineral, rock, or organic material. It is the most common type of sedimentary rock and is found in all parts of the world. Sandstone is formed when sand is buried and compacted over time. The sand grains are cemented together by minerals such as silica, calcite, or iron oxide.
Sandstone is a good reservoir rock for oil and gas because it is porous and permeable. Porosity is the ability of a rock to hold fluids, and permeability is the ability of a rock to allow fluids to flow through it. Sandstone is both porous and permeable because it is composed of sand grains that are loosely packed together.
The other options are not as good reservoir rocks as sandstone. Granite is an igneous rock that is formed when magma cools and solidifies. It is not porous or permeable, so it is not a good reservoir rock for oil and gas. Shale is a sedimentary rock that is formed from clay. It is also not porous or permeable, so it is not a good reservoir rock for oil and gas. Salt is a sedimentary rock that is formed from the evaporation of seawater. It is not porous or permeable, so it is not a good reservoir rock for oil and gas.