某上市公司因减资原因按每股15元回购本公司股票300万股，该股票为溢价发行，发行价格每股4元(假定不考虑发行手续费)。回购时，公司股本为50000万股，每股面值1元，资本公积为1200万元，盈余公积为7500万元。回购后，该公司的盈余公积为( )万元。

A．3000

B．4200

C．3900

D．7500

Which of the following is true of world steel production

A．The steel industry still has a bright prospect on a global scene.

B．Steel consumption in the world registered a drastic cut.

C．Steel makers are drastically cutting down their production.

D．Better promotion is needed for improving sales of steel products.