A nurse is caring for a client who is postpartum, has a deep-vein thrombosis, and is receiving heparin therapy via subcutaneous injections. Which of the following actions should the nurse take?

Request a prescription for PRN aspirin from the provider.

Massage the injection site thoroughly following administration.

Instruct the client that they cannot breastfeed while receiving heparin.

Administer the injection in the client's abdomen.