Put a picture of the article so i can help :). i cant know what this article is about with just the question.
ANSWER: B) The price of producing one additional unit of a good
EXPLANATION: Marginal Cost is the cost of producing one additional unit of goods or service. It is the change in the opportunity cost when one additional unit is added for production. All the costs that involved in producing the extra unit of goods is included in the Marginal Costs whereas the costs which does not have any affect on the number of units produced are called Fixed Costs.
Option B
The English established Jamestown, Virginia, on May 14, 1607, the first permanent British settlement in North America
Yes it was planned but not by a specific person