A No. The introductory claim states it would be a mistake to include it in the first sentence.

B No. Not a reason which is relevant or related to the evidence mentioned.

C No. It plays a conclusion, which needs to be supported by a premise.

D No. slightly an opinion but more considered as a conclusion, which needs to be supported by a premise.

E Yes. The conclusion is related to the argument of not meeting the demand for supply.