The main reason for the latest rise of oil price is ______.

A．oil-price shocks are less shocking now
B．inflation seems irrelevant to oil-price shocks
C．energy conservation can keep down the oil prices
D．the price rise of crude leads to the shrinking of heavy industry

A．warn young people of the hardships that a successful writer has to experience
B．advise young people to give up their idea of becoming a professional writer
C．show young people it's unrealistic for a writer to pursue wealth and fame
D．encourage young people to pursue a writing career