Generally speaking, England's medieval period begins with the "<span>A. invasion of the Anglo-Saxons," although the exact timeline is slightly disputed. </span>
Answer: The south seceded because Abraham Lincoln was elected president
Explanation: Since Lincoln was an abolitionist, the economic interests of the slave-owner southern landowners were threatened, as it would mean economic ruin, since it meant they would have to pay wages and a change their way of life.