DETROIT, MI—General Motors is making waves after a surprise unveiling of a line of exciting new California-compliant vehicles. After a week of building anticipation, officials at the company revealed its latest innovation for the West Coast: the 2021 Horse And Buggy. The curiosity started last week when GM's Twitter account dropped a cryptic photo of a lone carrot with the phrase "It's coming." Finally, at a live event this week, officials at the company pulled the cover off a stylish, elegant carriage pulled by a powerful single horse. "We had to re-think everything," said lead designer Abraham Moses Jehoshaphat from...