【单选题】

Which of the following can NOT be concluded from 'the statement "it is harder to talk about immigration as an economic issue." (Para. 4)
A．(A) Immigration is often considered as a political or social issue rather than an economic issue in Britain.

B．(B) Immigrants do not have noticeable impact on British economy.
C．(C) Immigrants' contribution to the prosperity of Britain is often neglected.
D．(D) In America, the issue of immigration is mainly about its economic implications.