Final answer:
The priority instruction that will assist the client in the prevention of complications associated with heart failure is “Weigh yourself daily while wearing the same amount of clothing”.
Step-by-step explanation:
The priority instruction that will assist the client in the prevention of complications associated with heart failure is “Weigh yourself daily while wearing the same amount of clothing”. This instruction is important because it helps monitor changes in fluid retention, which is a common complication in heart failure. By weighing themselves daily, the client can identify any sudden weight gain, which may indicate fluid accumulation and the need for adjustments in their treatment plan.