Given here are four sentences. The first sentence is in correct order, while the rest of the sentences are jumbled. Pick the option that gives their correct order.
A. World Environment Day is celebrated on 5 June every year by the UN.
B. In 2019, more than 130 countries participated actively and supported it.
C. It is the UN’s most impactful campaign for spreading awareness to conserve our environment.
D. Over the years this campaign has become the means for public participation.