Select all that apply $[$point deduction on every wrong selection, partial point on every correct selection$]$: What is secret sharing and how does it differ from Multi$-$sig? A$.$ Secret sharing is different from Multi$-$sig. Multi$-$sig is used by Bitcoin script to directly allows you to sign multiple times on the same transaction in order to make the transaction more secure$.$ B$.$ Secret sharing is to split a secret key into N pieces, such that given any K pieces, can reconstruct the secret, given fewer than K pieces, don$$t learn anything. C$.$ Secret sharing is different from Multi$-$sig. Multi$-$sig is used by Bitcoin script to directly allows you to stipulate that control over an address be split between different keys. D$.$ Secret sharing is to split a secret key into N pieces, such that given all N pieces, can reconstruct the secret, given fewer than N pieces, don$$t learn anything.