question: OPTIONS:
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As drive density increased, the precision and speed limitations of stepper motors made them obsolete for hard drivesthe precision limitation made them unusable, and the speed limitation made them uncompetitivethus newer hard disk drives use voice coil-based head actuator systems.
Why were stepper motors abandoned in computer drive designs?

answer: yes

[Q]: Sentence: For example, the pricing model for CDOs clearly did not reflect the level of risk they introduced into the system. Question: How much did JPMorgan estimate was the average recovery rate for mezzanine CDOs that had been liquidated? OPTIONS:
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- no
++++++++++
[A]: no

Q: Does "Much of YouTube's revenue goes to the copyright holders of the videos." provide a valid answer to "Where does the majority of youtube's revenue go?"?
OPTIONS:
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A: yes

Problem: Does "The city government was a petitioner in the landmark Massachusetts v. Environmental Protection Agency Supreme Court case forcing the EPA to regulate greenhouse gases as pollutants." answer the question "What legal case sought to compel the Environmental Protection Agency to regular greenhouse gases?" OPTIONS:
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A: yes

Does the sentence "According to the latest nationwide census, Roman Catholics constituted 30.8% of the total population of Germany, followed by the Evangelical Protestants at 30.3%." provide a valid answer to the question "What percentage of Germans are Roman Catholic?" OPTIONS:
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A: yes

Does the sentence "When North Korea declared its intention to do this the Secretary-General of the United Nations, acting as registrar, said that original signatories of the ICCPR had not overlooked the possibility of explicitly providing for withdrawal, but rather had deliberately intended not to provide for it." provide a valid answer to the question "Who, acting as registrar, informed North Korea that withdrawal was deliberately precluded by the original signatories of the International Covenant on Civil and Political Rights?" OPTIONS:
- yes
- no

A:
yes