Please answer the following question: Write a multi-choice question for the following article: Article: An affordable housing law passed three years ago promises a possible supply of below-market-rate homes, but has failed to encourage increased housing production and is unlikely to affect prefix = st1 /San Francisco's poorest families. Barbara, 44, who came to The City in 1970, have been trying to pick herself up from the bottom, where she and her children started out with just the clothes on their backs-through the kindness of others they got by. They were last homeless in 1999. Since then, Barbara has worked hard to keep from returning to the streets and the shelters, taking advantage first of transitional housing, then a rent assistance, and studying for a job as a nursing assistant and a home health aide. However the cost for housing has made it difficult for her to _ . She can't afford proper housing. Even an improper shelter costs as much as $ 1,200 for rent. She has to spend every night in a dining room. In this respect, she is not alone. There are hundreds of thousands of San Franciscans who are in the same boat with her. Since 2000, she's been providing health care in the homes of charity , and relying on an assistance program to pay the rent for her two-bedroom apartment in the Lower Height. A few months ago she lost her full-time job due to budget cuts, just as she had hoped to get a permanent post that would allow her to cover her $ 1,700 monthly rent. Now she works three or four hour shifts six days a week for $ 10.50 an hour, taking the bus around from client to client and worrying that in February, when her rent assistance is gone, she could end up on the streets with her family again.
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Question: From the passage we can learn that _ in San Francisco.Options:A there is a serious lack of proper housingB there are many people who can not afford housingC transitional housing is as expensive as apartmentsD a rent assistance can be given to every citizenAnswer:B