About one - third of Americans who qualify for public assistance haven’t signed up. That amounts to millions of people needlessly going without food stamps, low - income housing or health insurance. This trouble is what Real Benefits, a Boston—based software start- up, was created to solve. The five - person firm’s web database substitutes easy - to - use screening(放映，播放) and enrollment tools for complicated government paperwork. So far Real Benefits has connected nearly 100,000 families to more than $ 371 million in government aid since 2000. What may be the reason that many Americans who qualify for public assistance haven’t signed up
A. The application for social security is too complicated for many families. B. They can afford a life even without getting money from the government. C. They don’t know how to use computer database to submit applications. D. They would not get aid from governments even though they sign up.