TASK DEFINITION: This task is about creating an unanswerable question based on a given passage. Construct a question that looks relevant to the given context but is unanswerable. Following are a few suggestions about how to create unanswerable questions:
(i) create questions which require satisfying a constraint that is not mentioned in the passage
(ii) create questions which require information beyond what is provided in the passage in order to answer
(iii) replace an existing entity, number, date mentioned in the passage with other entity, number, date and use it in the question
(iv) create a question which is answerable from the passage and then replace one or two words by their antonyms or insert/remove negation words to make it unanswerable.
PROBLEM: Passage: One way to divide hunter-gatherer groups is by their return systems. James Woodburn uses the categories "immediate return" hunter-gatherers for egalitarian and "delayed return" for nonegalitarian. Immediate return foragers consume their food within a day or two after they procure it. Delayed return foragers store the surplus food (Kelly, 31).

SOLUTION: What is the only way to divide hunter-gatherer groups?

PROBLEM: Passage: Old English was not static, and its usage covered a period of 700 years, from the Anglo-Saxon settlement of Britain in the 5th century to the late 11th century, some time after the Norman invasion. While indicating that the establishment of dates is an arbitrary process, Albert Baugh dates Old English from 450 to 1150, a period of full inflections, a synthetic language. Perhaps around 85 per cent of Old English words are no longer in use, but those that survived, to be sure, are basic elements of Modern English vocabulary.

SOLUTION: Where did Anglo-Saxons settle in the 500's?

PROBLEM: Passage: At the time, the Umayyad taxation and administrative practice were perceived as unjust by some Muslims. The Christian and Jewish population had still autonomy; their judicial matters were dealt with in accordance with their own laws and by their own religious heads or their appointees, although they did pay a poll tax for policing to the central state. Muhammad had stated explicitly during his lifetime that abrahamic religious groups (still a majority in times of the Umayyad Caliphate), should be allowed to practice their own religion, provided that they paid the jizya taxation. The welfare state of both the Muslim and the non-Muslim poor started by Umar ibn al Khattab had also continued. Muawiya's wife Maysum (Yazid's mother) was also a Christian. The relations between the Muslims and the Christians in the state were stable in this time. The Umayyads were involved in frequent battles with the Christian Byzantines without being concerned with protecting themselves in Syria, which had remained largely Christian like many other parts of the empire. Prominent positions were held by Christians, some of whom belonged to families that had served in Byzantine governments. The employment of Christians was part of a broader policy of religious assimilation that was necessitated by the presence of large Christian populations in the conquered provinces, as in Syria. This policy also boosted Muawiya's popularity and solidified Syria as his power base.

SOLUTION:
What populations did not have autonomy?