问题如下：
Country Y is a developing country, which make some strategy to improve per capita GDP:
Strategy 1: making investment is public infrastructure.
Strategy 2: raise tariffs to protect their domestic enterprises.
Strategy 3: make investment in education industry.
Which strategy is least likely to improve per capita GDP?
选项：
A.Strategy 1.
B.Strategy 2.
C.Strategy 3.
解释：
B is correct.
考点：各种factor对人均产出的影响
解析：因为CFA协会是崇尚的是自由贸易，所以增加关税并不是一个对一国经济发展有利的举措。
1.增加公共设施投入怎么对人均产出提高？
2.虽然CFA崇尚贸易自由，但是本题目问的是GDP per capita，那保护本国企业发展，保证本国人民人均产出高，不对么？
