potential for election infiltration and meddling. Which of the following statements regarding election infiltration in the $2016$ U$.$S$.$ presidential election is true?

Question $6$ options:

$1)$

Russian trolls used Facebook to try to organize both pro$-$Islamic and anti$-$Islamic protests.

$2)$

Russian hackers released internal document from the Trump campaign.

$3)$

No Russians were charged as a result of their election infiltration.

$4)$

Fortunately, U$.$S$.$ Intelligence officials have concluded that Russian election infiltration efforts in $2016$ were an isolated incident.

$5)$

All the evidence suggests that Russia regards its $2016$ election meddling efforts as a failure.