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. during the ice age, north africa was a land of shallow lakes and rich vegetation. during the ice age, north africa was a land of shallow lakes and rich vegetation. during the ice age, north africa was a land of shallow lakes and rich vegetation. during the ice age, north africa was a land of shallow lakes and rich vegetation.