Four columns of a building are to be located within a plot size of $10 \mathrm{~m} \times 10 \mathrm{~m}$. The expected load on each column is $4000 \mathrm{kN}$. Allowable bearing capacity of the soil deposit is $100 \mathrm{kN} / \mathrm{m}^{2}$. The type of foundation best suited is
(A) isolated footing
(B) raft foundation
(C) pile foundation
(D) combined footing
Four columns of a building are to be located within a plot size of $10 \mathrm{~m} \times 10 \mathrm{~m}$. The expected load on each column is $4000 \mathrm{kN}$. Allowable bearing capacity of the soil deposit is $100 \mathrm{kN} / \mathrm{m}^{2}$. The type of foundation best suited is
(A) isolated footing
(B) raft foundation
(C) pile foundation
(D) combined footing