During the cuban missile crisis, u. s. president and soviet leader almost took the world into a nuclear war. a) carter, brezhnev eliminate b) reagan, gorbachev c) johnson, khrushchev d) kennedy, khrushchev

The correct answer is ( D ) Kennedy, Kruschev.  The crisis started in 1962, when an american spy plane took pictures of Soviet long range missiles deployed in Cuba. According to the experts these missiles coul reach almost any point in the States.

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering