How Was Terrorism Involved in the 2003 Russian Elections

How was terrorism involved in the 2003 Russian elections?

A) Putin's hard stance on terrorism was something that the citizens valued.
B) A terror attack happened the month prior to the elections but it turned out to be staged by one of the parties.
C) On Election Day a terror attack actually took place, causing the election to be pushed back several days.
D) Russia was considering implementing a policy to ban all visitors to Russia from the Middle East that Putin was strongly against, and the issue came to define the election.