I believe the answer is Information.
In the past, information could be easily controlled since only radio and television media have the ability to provide it to the mass.
In recent years, the development of internet and social media have make the spread of information could no longer be controlled by the government.
Answer:
a.option is the correct answer
A leap year is a calendar year that contains an additional day added to keep the calendar year synchronized with the astronomical year or seasonal year.
