By not accepting finance contributions during the presidential campaign, barack obama his cause -he would not need to repay nearly as much money -he was able to spend less time trying to come up with funds -he was not limited on how much money he could raise -there was less of a need to solicit funds from outside sources

By not accepting public finance contributions during the presidential campaign, Barack Obama helped his cause because: he was not limited on how much money he could raise, and his ammount reached $638 million, compared to McCain's $206 million, who accepted $84.1 million in taxpayer financing. While Obama reported more than 580.000 donors, McCain only reported 170.000 donors.

i believe the correct answer is option b. most eastern european nations joined nato.

though i could be wrong, option d. the eastern european nations were granted complete independence, would be another choice.

hope this ! : )

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering