单选题 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.