The nurse should check the medication label against the MAR three times: before removing the medication from the storage area, before preparing or measuring the medication, and before administering the medication to the client.

The nurse should also ask the client to state their name and date of birth and use a barcode scanner to verify the client's identification band and the medication. These are methods of ensuring that the right medication is given to the right client.

The nurse should follow the six rights of medication administration: right client, right medication, right dose, right route, right time, and right documentation.

The nurse should document the medication administration as soon as possible after giving the medication, not after completing other tasks.

a) Correct. This is one of the methods of ensuring medication safety.

b) Correct. This is another method of ensuring medication safety.

c) Correct. This is a third method of ensuring medication safety.

d) Incorrect. The nurse should document the medication administration as soon as possible after giving the medication, not after completing other tasks.

e) Correct. This is a general principle of medication safety.