The specific rotation of a solution of (S)-bromoglorpane is +23.1", while the specific rotation of an equivalent solution of (S)-glorpanol is -46.20. If (S)-bromoglorpane undergoes an SN2 reaction with hydroxide ion, what will be the specific rotation of the solution when the reaction is complete?

a. +46.2'
b. +23.1'
c. Slightly greater than 0
d. Slightly less than 0
e. -23.1'
g. -46.2'