Answer:
independent groups
posttest only
pretest/posttest
Explanation:
Posttest-only and pretest/posttest are the two elementary structures for experiments with independent-groups designs.
A posttest only design is most useful when spontaneous behavior is required from the participants.
Pretest-posttest designs developed from the posttest only design to consider issues of assignment bias and allocation of the participants, as they can avoid selection effects.
We would need the options, but lunch breaks is an answer
charles darwin. Just took test
Answer:
In this environment the largest empire to ever exist helped one of the most influential trade routes in the world, known as the Silk Road, to flourish. This route allowed commodities such as silk, pepper, cinnamon, precious stones, linen, and leather goods to travel between Europe, the Steppe, India, and China.The resulting stability brought by Mongol rule opened these ancient trade routes to a largely undisturbed exchange of goods between peoples from Europe to East Asia. Along the Silk Road, people traded goods such as horses, porcelain, jewels, silk, paper, and gun powder
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