If Toyota builds a new plant in the north of England

A．there has been an increase in foreign portfolio investment in the UK

B．once the plant starts producing cars UK GDP will rise less than UK GNP

C．once the plant starts producing cars UK GDP and GNP will both fall because some income from this investment will accrue to foreigners

D．once the plant starts producing cars UK GDP will rise more than UK GNP．

请帮忙给出正确答案和分析，谢谢！