A Patient Who Has Heart Failure Receives Digoxin (Lanoxin)and an Angiotension-Converting

A patient who has heart failure receives digoxin (Lanoxin) and an angiotension-converting enzyme (ACE) inhibitor.The patient will begin taking spironolactone (Aldactone) .The patient asks why the new drug is necessary.The nurse will tell the patient that spironolactone will be given for which reason?

A) To enhance potassium excretion
B) To increase cardiac contractility
C) To minimize fluid losses
D) To provide cardioprotective effects