According to the conversation, why wont DME be on the market soon？A．It hasn"t been adequat

According to the conversation, why wont DME be on the market soon？

A．It hasn"t been adequately tested.

B．It"s expensive.

C．It damages car engines.

D．It"s dangerous to transport.

请帮忙给出正确答案和分析，谢谢！

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