performance measure

Dear Sir:

In the following question, as it is rather tricky, I tend to choose option d. Since part one shows effectiveness and cost of surgical procedure is likely to be economy related. However, I would like to have your kind advice in this regard.

Thanks, Shams

A hospital management team assess the hospital’s performance using the value for money criteria of efficiency, effectiveness and economy.
1. The number of patients who need to be re-admitted following surgery.
2. The staff cost of each surgical procedure.
Which element of value for money criteria is assessed by each performance measure?
a) 1 Economy 2 Efficiency.
b) 1 Efficiency 2 Effectiveness.
c) 1 Effectiveness 2 Efficiency.
d) 1 Effectiveness 2 Economy.