In each of the questions four different ways of presenting an idea are provided.Choose the one that conforms closely to standard English usage.

Denim jeans were originally worn not so much aas a fashion statement as for their being practical work clothes.

Denim jeans were originally worn not so much as a fashion statement but for their being practical work clothes.

Denim jeans were originally worn not so much as a fashion stement but for being practical work clothes.

Denim jeans were originally worn not as a fashion statement as for them being practical work clothes.