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8. Cyclobutane and methylcyclopropane are examples of: (A) enantiomers (B) stereoisomers (C) diastercomers (D) constitutional isomers (E) None of these 9. The absolute configurations (R/S) at C2 and C6 of the molecule below are respectively: and 10. Beng's ligand (shown below) (A) Contains two stereocenters that are both R (B) Contains two stereocenters that are both S (C) Contains two stereocenters; one is R and the other is S (D) Contains three stereocenters (E) Contains four stereocenters 11. Designate the tritium-bearing stereocenter in compound A (shown below) as either R of S