Read this passage. Some people think of Ben Franklin primarily as a statesman and diplomat. Others consider him to be, first and foremost, an inventor and author. The truth of the matter, however, is that Franklin was a polymath.

Which sentence could be added to the passage and maintain its formal style?

He knew it all and wasn't afraid to let others know he knew it.

You wouldn't believe how bright he was in all sorts of areas and topics and subjects.

He was a figure of wide-ranging knowledge, expertise, and accomplishment in several fields.

He was absolutely the smartest dude in every room he entered.