According to the passage, the author's tone about exercise can be described as ______.

A．find the marathons very exciting
B．love traveling all over the country
C．want to keep fit
D．want to be good sportsmen

A．Because the farmers were uncertain about the financial support the government guaranteed.
B．Because the farmers were uncertain about the benefits of expanding production.
C．Because the farmers were uncertain whether foreign markets could be found for their produce.
D．Because the older generation of farmers were strongly against the programme.