Select three true statements regarding NFTs$.$

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Most NFTs are pieces of digital art attached to the Ethereum blockchain.Most NFTs are pieces of digital art attached to the Ethereum blockchain.

Using the Ethereum Request for Comment $721$ protocol $($ERC$-721),$ a smart contract wraps the digital artwork.Using the Ethereum Request for Comment $721$ protocol $($ERC$-721),$ a smart contract wraps the digital artwork.

NFTs give the owner exclusive rights to use the image.NFTs give the owner exclusive rights to use the image.

Because of its speed and low transaction costs, most NFTs are attached to a proof$-$of$-$stake $($PoS$)$ blockchain.