<span>a. The Soviets had been more prepared for the situations created by the Cold War. </span>
The word "tone" used as a linguistic term describes voice pitch, but the same term used to describe public speaking deals with a complex analysis of the speaker's attitude and how the audience perceives the overall message.
African slaves were brought to the English colonies to meet the demand for "<span>b. Labor brought about by large scale farming," since slaves were mostly used in toe fields to harvest crops such as tobacco and cotton. </span>
Can't answer this, since we don't have the article. If there are details about how black people in the north were freed from slavery in most states, while slavery was still allowed in the south, you could use that.
