Each question below has two blanks, which is indicating that something has been omitted. Choose the most suitable option indicating the words that can be used to fill up the blanks in the sentences to make them meaningfully complete. It will be foolhardy to look away from the writing on the wall. As the most _______ nation, home to over 1.46 billion people, the current _______ trend will admittedly take several years to have an impact on the population.