Amale client is diagnosed with heart failure. the health care provider orders a loading dose of digoxin. loading doses are necessary for what reason?

a) digoxin's long half-life makes therapeutic serum levels difficult to obtain without loading.
b) the client is at risk for dysthymia with titrated doses.
c) oral digoxin is ineffective for the treatment of heart failure.
d) digoxin's short half-life increases the risk for toxicity.