Which was not a major cause of russian weakness in the mid-1800s?

a)) the invasion of napoleon's grand army

b) autocratic rule

c) defeat in the crimean war

d) serfdom

A. The invasion of Napoleon's grand army

Napoleon's army invaded in 1801 I believe and Russia's winter totally whipped their behinds so even then Napoleon's army was not a cause of Russia's weakness.

The answer your looking for is A. the invasion of napoleon's grand army hope this helped have a nice day :) 

Ais your correct answer