Casey is worried about downgrade attacks against her Apache web servers. What should she do to most effectively prevent downgrade attacks?

Preventing fallback options from being used for encryption may stop some clients from connecting but will most effectively prevent downgrade attacks. Current browsers may be needed for this, but requiring that does not prevent attackers from using a downgrade attack if fallback options are allowed. Current web server software does not prevent settings from being weak. An IDS can detect downgrade attempts but cannot stop them.