What was a key reason chester arthur was not re-nominated by the republicans for a second presidential term?

a.)he wanted to raise tariffs to an all-time high.
b.)he was involved in bribery scandals during his term.
c.)he was a reformer who tried to eliminate patronage jobs.
d.)he began a campaign to repeal the sherman silver purchase act.
e.)he believed in rewarding those who his election campaign.