A survey of entrepreneurs
who started companies last year shows that while virtually all did substantial
preparatory research and planning, only half used that work to produce a formal
business plan.
Since, on average, the
entrepreneurs without formal plans secured the capital they needed in half the
time of those with plans, these survey results indicate that, in general,
formal plans did not help the entrepreneurs who produced them to secure the capital
they needed.
     

Which of the following,
if true, most seriously weakens the argument?
     

A.
Companies started by entrepreneurs who had used formal
business plans to attract investment were on the whole as profitable in their
first year as were companies started by entrepreneurs who had not produced such
plans.

B.
In surveys of entrepreneurs who have attempted without
success to raise sufficient capital, more than half of the respondents indicate
that they have produced a formal business plan.
     

C.
Among the entrepreneurs surveyed, those who did
not produce formal business plans sought and received a much larger proportion
of their capital from investors with whom they had a long-standing business
relationship.

D.
The entrepreneurs surveyed who did not produce a formal business
plan spent nearly as much time doing preparatory research and planning as the
entrepreneurs who produced plans.

E.
The entrepreneurs who produced business plans generally
reported later that the process of writing the plan had increased their
confidence that their company would succeed.

题干中说这个business plan不会有什么帮助，但是正确答案C选项中是说没有这个plan反而会受益 明明是strengthen....还是我脑子晕了