Answer:
I believe the answer would be D.
<span>Biodiesel is defined as mono-alkyl esters of long chain fatty acids derived from vegetable oils
or animal fats which conform to ASTM D6751 specifications for use in
diesel engines. Biodiesel refers to the pure fuel before blending with
diesel fuel.
i hope this helps you in the time of your need!! =D
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Piaget championed the position
called constructivism. Constructivism is a theory on learning, which suggests that
people acquire knowledge from their experiences and together with knowledge
that they already have, construct their own understanding of these things. Piaget's
theory extends over learning theories, teaching methods, and education reform.
Agricultural society, if I understand the question correctly.