工程风险按损失承担主体分类，可分为( )等。

A．人身意外伤害险

B．发包人风险

C．第三者责任风险

D．其他责任人风险

E．承包人风险

The figure above represents a window, with the shaded regions representing openings for glass and the pale regions representing the wood panels between and around the glass. If the window is 4.5 feet high by 2.5 feet wide, and if each of the wooden panels is exactly 4 inches thick, what is the total surface area, in square inches, of glass in the window ？（）
(1 foot=12 inches; figure not drawn to scale)

A. 189

B. 378

C. 448

D. 756

E. 1,620