I am pretty sure its D. I am not 100% positive but I read an article and that appears to be correct.
The correct answer is A) building shelters.
The pioneers’ first priority was building shelters.
Life was difficult for pioneers who decided to leave their former lands and travel to the west in the time if US history called "the westward expansion." The Oregon Trail was also a difficult road to cross. Many people could complete it. Hunger was a major issue.
Pioneers had to build their shelters to endure climate conditions, clear the land for farming. However, the opportunity to have their own portion of land motivated many farjmers, former slaves, and immigrants.
Answer:
The characteristics that pulled the Greek city states together were the poetry of Homer and the food growth and preparation.
They emphasized the need to fight for civil rights and against the war in Vietnam. This was during the Fourth Great awakening as some historians like to call that period of time. The preachers were often social activists and the churches organized protests and support for people who wanted to fight inequality.