The correct answer is: C. Combined footing
A combined footing is a type of foundation that is used to support two or more columns that are close together. It is made up of a single, continuous footing that is wider than the individual footings that would be used if the columns were supported by separate footings. The cantilever beam is provided to join the two footings and to distribute the load from the columns more evenly.
A strip footing is a type of foundation that is used to support a single column or a row of columns that are closely spaced. It is made up of a narrow, rectangular slab of concrete that is wider than the column or columns that it supports.
A strap footing is a type of foundation that is used to support two or more columns that are not close together. It is made up of two or more footings that are connected by a strap beam. The strap beam helps to distribute the load from the columns more evenly.
A raft footing is a type of foundation that is used to support a large, heavy structure. It is made up of a continuous slab of concrete that supports the entire structure. Raft footings are often used in areas with poor soil conditions.