Why are the melting points of cis-unsaturated fatty acids lower than those of trans-unsaturated fatty acids?
A) The cis-unsaturated fatty acid chains are shorter.
B) The trans-unsaturated fatty acid chains pack together in close parallel alignment.
C) The cis-unsaturated fatty acid chains have stronger London dispersion forces.
D) All three factors (a)-(c) are important.
B
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