Answer:
The correct answer is Its impact was mostly positive as Western Europe became or remained strongly democratic.
Step-by-step explanation:
Correct answer is C because Marshall Plan helped European countries (mostly Western countries) to overcome the difficulties they had after WW2. This help was offered even to the Soviet Union, but they refused it.
That is why other options are wrong. We know about its impact, especially because a lot of money was sent. According to the sources, around 13 billion dollars.