It is true that______ a wild plant into a major crop such as wheat requires much research time.

A．to produce things
B．the shape one's work takes
C．the amount of money it makes
D．one's attitude towards the work

A．Sometimes you have to adjust yourself to your work.
B．There is space for you to show your creativity.
C．Work must be done in one way in order to be the most efficient.
D．You may never cheat yourself.