Which of the Following Statements Is/are Correct in Relation to Changes

Which of the following statements is/are correct in relation to changes brought about by the federal Electronic Transactions Act 1999 and identical state legislation?

A) Electronic contracts for real estate agreements may be substituted for the usual 'paper' documents.
B) Electronic documents may be substituted for paper documents that are used to confirm identities,such as documents that are used for migration purposes.
C) Electronic signatures,such as PINs,may be substituted for handwritten signatures.
D) All of the above.