Which of the following conditions will give the most benefits? Why?
$(a)$ Farmers use high-quality seeds,do not adopt irrigation or use fertilizers.
$(b)$ Farmers use ordinary seeds,adopt irrigation and use fertilizer.
$(c)$ Farmers use quality seeds,adopt irrigation,use fertilizer and use crop protection measures.

• A
  $(a)$ Farmers use high-quality seeds,do not adopt irrigation or use fertilizers.
• B
  $(b)$ Farmers use ordinary seeds,adopt irrigation and use fertilizer.
• C
  $(c)$ Farmers use quality seeds,adopt irrigation,use fertilizer and use crop protection measures.
• D