Compare two treatments. Treatment A provides an improvement of 0.1 QALYs at a cost of $2,000, whereas Treatment B provides an improvement of 0.2 QALYs at a cost of $5,000. Which treatment will planners prefer by cost-efficiency criteria?a. treatment A because it is cheaper.
b. treatment B because it provides a greater improvement.
c. treatment A because it has a lower cost per QALY.
d. treatment B because it has a lower cost per QALY.