What is the difference start fraction r plus 2 over r plus 4 end fraction minus start fraction 3 over r plus 1 end fraction ?

A. start fraction negative 1 over r plus 3 end fraction
B. start fraction r superscript 2 baseline minus 1 over left parenthesis r plus 1 right parenthesis left parenthesis r plus 4 right parenthesis end fraction
C. start fraction r superscript 2 baseline minus 10 over left parenthesis r plus 1 right parenthesis left parenthesis r plus 4 right parenthesis end fraction
D. start fraction r superscript 2 baseline plus 14 over left parenthesis r plus 1 right parenthesis left parenthesis r plus 4 right parenthesis end fraction

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