The answer is B. By covered wagon
Islam's history on the African continent is rich, more than a millenium of expansion, scholarship, conquest, empire and theological development. ... The historial impact of Islam upon trade, particularly in West Africa, greatly increased the wealth of African people and helped form many great African empires.
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The correct answer is Mixed Economy
A mixed economy is a form of economy that combines two or more distinct economic models. As economic systems are complex and generally hybrid, criteria are used to evaluate "ideal" economic systems or modes of production, such as feudalism, capitalism, socialism. In most cases, these are more specific patterns or models, hybrids of variations in a system, intermediaries between different patterns, such as liberal market capitalism and politically oriented capitalism. Even so, per capita income continues to evolve with human dexterity in the face of the outside world. Even without knowing how to deal with this, the Chinese have always committed themselves, for having a mixed economy, which is economic capitalism and socialism.
Answer: An algorithm
Explanation:
Algorithm could be described as a way of carrying out a process through following instructions strictly. It's a systematic way of going about a process.
The problem solving method that involves the systemic search is called An algorithm
You might be surprised to find, however, that the first seismometer was invented in China in 132 AD by a Chinese astronomer, mathematician, engineer, and inventor called Zhang Heng. The instrument was said to resemble a wine jar six feet in diameter, with eight dragons positioned face down along the outside of the barrel, marking the primary compass directions. In each dragon’s mouth was a small bronze ball. Beneath the dragons sat eight bronze toads, with their broad mouths gaping to receive the balls. When the instrument sensed an incoming seismic wave, one of the balls would drop and the sound would alert observers to the earthquake, giving a rough indication of the earthquake’s direction of origin. The device is said to have been very accurate and could detect earthquakes from afar, and did not rely on shaking or movement in the location where the instrument was positioned. The first ever earthquake recorded by this seismograph was supposedly somewhere in the east. Days later, a rider from there reported this earthquake. Moreover, it had the most wicked ornaments. They don’t make scientific instruments like they used to! Of course, the insides of the seismometer was filled with a sensing mechanism of some sort, the contents of which have been lost in time. In all likelihood, a simple or inverted pendulum was employed, according to experts.