The correct answer is A. H-pile.
H-piles are steel piles that have a cross-section in the shape of an “H”. They are made of rolled steel sections and are driven into the ground by a pile driver. H-piles are very strong and can be used in a variety of soil conditions, including soft clay.
Screw piles are steel piles that have a helical screw on the end. They are driven into the ground by rotating the screw. Screw piles are often used in soft soils because they can be driven into the ground without compacting the soil.
Disc piles are steel piles that have a disc on the end. The disc is used to create a bearing surface on the ground. Disc piles are often used in soft soils because they can be driven into the ground without compacting the soil.
Pipe piles are steel pipes that are driven into the ground. They are often used in waterlogged soils because they can be driven into the ground without displacing the water.
In soft clay of low bearing capacity, H-piles are generally used because they are strong and can be driven into the ground without compacting the soil.