The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
There are an estimated 1 billion illiterate people in the world. What is the social cost of this level of illiteracy?
According to some studies, the cost of illiteracy in the world is around $1.19 trillion.
Historians and sociologists consider that this is a big issue on the planet. Around the world, there are approximately 800 million people without basic education. Alone in the United States, the cost is estimated to be $300 billion.
Another important indicator is that 43% of Americans that are illiterate, lived in poverty.