To summarize the effects of the revolutions of
1848 upon the Concert of Europe, it can be
argued that:
• The revolutions of 1848 effectively
destroyed the absolutist regimes in Europe
(except in Russia), thus ending the very
basis upon which the Holy Alliance was
built. As such, monarchist, anti-liberal,
and anti-nationalist characteristics became
obsolete as almost every European state
was transformed into a constitutional
monarchy.
• As Metternich was taken out of office, the
last political figure from the Congress of
Vienna had departed. The signatories of the
Holy Alliance and founders of the Concert
system eventually ceased to exist.
• The revolutions in Austria demonstrated
the weakness of the Habsburg monarchy as
its empire came to the brink of dissolution.
Her role as manager and balancer of the
Concert system could no longer be fulfilled.
• The rise of liberalism and nationalism
with the revolutionary movements and
their success in establishing constitutional
regimes affected the policy-making of the
states. Unlike absolute monarchies, the new
governments were responsible to people
for legitimizing their policies. Therefore,
cooperation among actors under these new
circumstances was not as easy.
• The major powers found themselves in an
atomized state in which each state shifted
to its own individual interest rather than
compromise on a common interest that
promised mutual gains from the existing
status quo.

According to these arguments, the correct answer is option C.