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it will be walls

Explanation:

The curtain, a feature common to mast medieval castles, was simply a set of walls that surrounded and protected the interior of the castle. 

gold discovery in california, and pioneer settlers were sometimes pulled west because they wanted to make a better living. others received letters from friends or family members who had moved west. these letters often told about a good life on the frontier. the biggest factor that pulled pioneers west was the opportunity to buy land.

welcome mark brainliest i am trying to get to the next level.

option c

explanation:

strive for superiority