Which of the Following, If True, Would Weaken the Argument

Which of the following, if True, would weaken the argument of Domino Grace's management?

A) Competitors of Domino Grace have lured new customers by offering access to exotic new investment options.
B) A new political administration is expected to pass new financial regulations affecting derivative investments.
C) Derivative investments are similar to most investments in that when a trade is made a gain on one side is mirrored by a loss on the other.
D) Many of the investors who are interested in derivative investments are also interested in traditional investments.
E) The opinions of Domino Grace stockholders are representative of the opinions of the investment community in general.