Why did Mary flush when she heard the knocking on the door?

One way that the novel differs from earlier literary works is that novelists often leave out many details associated with the setting novels only portray positive aspects of heroes and other important figures characters' personalities in novels are only revealed through dialogue readers are often able to relate better to the characters in novels

Which of the following best states the purpose of an import quota? a. to prevent a budget deficit. b. to reduce competition from foreign producers. c. to increase the gross domestic product. d. to lower taxes and limit government spending

Need some on this. which answer is it?