Which sentence uses a semicolon correctly?

Question

(Remember, a semicolon joins two complete sentences.)

Then it was that his quick and anxious glance; asked the question.

He turned; and with a firm and rapid step he walked across the empty space.

His semified barbarism was manifest by the public arena; the minds of his subjects were refined.

Answer 1

He turned; and with a firm and rapid step he walked across the empty space.