The correct answer is: rise.
The word “rise” means to move or go up, especially to a higher level. In this context, the government is confident that the standard of living will start to improve again soon. This could mean that people will have more money to spend, that they will have access to better healthcare and education, or that they will have more opportunities for employment.
The other options are not as accurate. The word “revive” means to come back to life or to become active again. This does not necessarily mean that the standard of living will improve, only that it will start to increase again after a period of decline. The word “lift” means to raise or to cause to rise. This is similar to the word “rise,” but it does not have the same connotation of improvement. The word “flourish” means to grow or develop in a healthy or vigorous way. This does not necessarily mean that the standard of living will improve, only that it will be strong and healthy.