Which of the following anionic initiators give the slowest polymerization rate in a non-polar medium?

Which of the following anionic initiators give the slowest polymerizat

1.	Which of the following anionic initiators give the slowest polymerization rate in a non-polar medium?
A.	sodium naphthalene
B.	butyl lithium
C.	metallic lithium in NH<sub>3</sub>
D.	none of the mentioned
Answer» C. metallic lithium in NH<sub>3</sub>