市场预测的基础是( )的资料。

A．市场供求

B．市场调查

C．经济前景

D．相关政策

I wandered lonely as a cloud
That floats on high o’er vales and hills,
When all at once I saw a crowd,

A host, of golden daffodils;
Beside the lake, beneath the trees,
Fluttering and dancing in the breeze.
Continuous as the stars that shineAnd twinkle on the milky way,
They stretched in never-ending lineAlong the margin of a bay:
Ten thousand saw I at a glance,
Tossing their heads in sprightly dance.
Questions:A. Who wrote this poem
B. What’s the title of this poem
C. What is the poem mainly about