Paragraph 1- Improving your home's insulation and sealing air leaks are the fastest and most cost-efficient ways to reduce energy waste and make the most of your energy dollars. Be sure to seal air leaks before you insulate, because insulating materials won't block leaks. What is the meaning of the phrase most-effective in the first paragraph of this passage? recommended levels of insulation (exert 1).

A. Working hard for the money you earn
B. Saving your money for a future expense
C. Getting the most for the money you spent
D. Spending your money on something unnecessary