Which Statement Is an Example of a Political/legal Trend

Multiple Choice

Which statement is an example of a political/legal trend?

A) The South African Reserve Bank announces that it will decrease the interest rate it charges banks.
B) Government passes legislation that increases the tax rates on companies.
C) A new computer chip is announced which will allow for miniaturisation of many electronic devices.
D) The EU declares an increase in tariffs on all agricultural goods.