I would go with the first because of "serious".
So, according to you. Second one is also acceptable however it is not preferred. (I hope sentence is correct).
So, according to you. Second one is also exceptable however it is not preferred(I hope sentence is correct).
So, according to you, the second one is also [strike]exceptable[/strike] acceptable [strike] however it is[/strike] but not preferred. (I hope my sentence is correct.)
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