Which of the Following Is the Best Explanation as to Why

Multiple Choice

Which of the following is the best explanation as to why lithium is the strongest reducing agent of the alkali metals?

A) The ionization energy of lithium is the highest of the alkali metals.
B) The ionization energy of lithium is the lowest of the alkali metals.
C) The standard reduction potential of lithium is the most positive of the alkali metals.
D) The relatively high charge density of lithium compared to the other alkali metals.
E) None of these.