Which of the following projects(i.e.Project A, Project B or Project C) should be selected

A．Project A with opportunity cost of $100,000 and investment of $1,000,000.

B．Project B with opportunity cost of $200,000 and investment of $500,000.

C．Project C with opportunity cost of $300,000 and investment of $3,500,000.

D．Cannot be determined with available informatio

根据CΥ值的定义公式，空气的CT值为：

A．－700 HU

B．－800 HU

C．－900 HU

D．-1000 HU

E．－l100 HU