Which of the following lists contains, in this order, physical capital, and human capital? ( )
A.
For a shoe factory: hand tools, the managers' knowledge of shoe making.
B.
For a steel mill(炼钢厂): iron ore(铁矿石), the workers.
C.
For an airline: the pilots' knowledge of flying, jets(喷气机).
D.
None of the above is correct.