Which answer choice shows the correct capitalization for the proper noun in the following sentence? During the ice age, North Africa was a land of shallow lakes and rich vegetation. A. During the Ice age, north Africa was a land of shallow lakes and rich vegetation. B. During the Ice Age, North Africa was a land of shallow lakes and rich vegetation. C. During the Ice age, North Africa was a land of shallow lakes and rich vegetation. D. During the Ice Age, north africa was a land of shallow lakes and rich vegetation.