Problem: Egypt:

In the 1980s, 1990s, and 2000s, terrorist attacks in Egypt became numerous and severe, and began to target Christian Copts, foreign tourists and government officials. In the 1990s an Islamist group, Al-Gama'a al-Islamiyya, engaged in an extended campaign of violence, from the murders and attempted murders of prominent writers and intellectuals, to the repeated targeting of tourists and foreigners. Serious damage was done to the largest sector of Egypt's economytourismand in turn to the government, but it also devastated the livelihoods of many of the people on whom the group depended for support.

Who were primary targets of Egypt terrorist attacks?
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A: Christian Copts, foreign tourists and government officials

Problem: Green:

Green can communicate safety to proceed, as in traffic lights. Green and red were standardized as the colors of international railroad signals in the 19th century. The first traffic light, using green and red gas lamps, was erected in 1868 in front of the Houses of Parliament in London. It exploded the following year, injuring the policeman who operated it. In 1912, the first modern electric traffic lights were put up in Salt Lake City, Utah. Red was chosen largely because of its high visibility, and its association with danger, while green was chosen largely because it could not be mistaken for red. Today green lights universally signal that a system is turned on and working as it should. In many video games, green signifies both health and completed objectives, opposite red.

When were green and red standardized as the colors of international railroad signs?
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A: 19th century

Problem: Neolithic:

The shelter of the early people changed dramatically from the paleolithic to the neolithic era. In the paleolithic, people did not normally live in permanent constructions. In the neolithic, mud brick houses started appearing that were coated with plaster. The growth of agriculture made permanent houses possible. Doorways were made on the roof, with ladders positioned both on the inside and outside of the houses. The roof was supported by beams from the inside. The rough ground was covered by platforms, mats, and skins on which residents slept. Stilt-houses settlements were common in the Alpine and Pianura Padana (Terramare) region. Remains have been found at the Ljubljana Marshes in Slovenia and at the Mondsee and Attersee lakes in Upper Austria, for example.

What made ladders possible?
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A: unanswerable

Problem: On the Origin of Species:

Chapter I covers animal husbandry and plant breeding, going back to ancient Egypt. Darwin discusses contemporary opinions on the origins of different breeds under cultivation to argue that many have been produced from common ancestors by selective breeding. As an illustration of artificial selection, he describes fancy pigeon breeding, noting that "[t]he diversity of the breeds is something astonishing", yet all were descended from one species of rock pigeon. Darwin saw two distinct kinds of variation: (1) rare abrupt changes he called "sports" or "monstrosities" (example: ancon sheep with short legs), and (2) ubiquitous small differences (example: slightly shorter or longer bill of pigeons). Both types of hereditary changes can be used by breeders. However, for Darwin the small changes were most important in evolution.

Which evolutionary changes were the most important to Darwin?
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A:
the small changes