reducing agent , oxidizing agent

Au + 6 H2SeO4 = Au2(SeO4)3 + 3 H2SeO3 + 3 H2O
a. H2SeO4 is the reducing agent
b. H2SeO4 neutralizes gold
c. H2SeO4 is the oxidizing agent
d. hydrogen is reduced
e. nothing is reduced or oxidized since this is not an oxidation-reduction reaction