Given the question: I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "Following the earthquake, donations were made by people from all over mainland China, with booths set up in schools, at banks, and around gas stations. People also donated blood, resulting in according to Xinhua long line-ups in most major Chinese cities. Many donated through text messaging on mobile phones to accounts set up by China Unicom and China Mobile By May 16, the Chinese government had allocated a total of $772 million for earthquake relief so far, up sharply from $159 million from May 14."?
The answer is:
Blood is a form of?