2. The three-view drawing of a certain solid is shown in the figure (unit: cm). The volume of this solid is\\
A. $8 \mathrm {~cm} ^ { 3 }$\\
B. $12 \mathrm {~cm} ^ { 3 }$\\
C. $\frac { 32 } { 3 } \mathrm {~cm} ^ { 3 }$\\
D. $\frac { 40 } { 3 } \mathrm {~cm} ^ { 3 }$