Private goods are not excludable.

When the ________ system of voting is used, each voter ranks alternatives and awards more points to higher-ranked alternatives and fewer points to lower-ranked alternatives. The alternative that receives the most total points from all voters wins

Fill in the blank(s) with correct word

Jack refused to contribute money for building a public park when he was contacted individually. However, he readily agreed to donate when he was asked to contribute for a similar cause in front of his neighbors

Such behavior is an example of ________. A) pure altruism B) consumerism C) rationalism D) impure altruism