De Havilland DH-88 Comet alternatives

Everybody knows the DH-88 Comet that won the 1934 Melbourne Air Race. But what if the designers at De Havilland had gone another way in their design.

What if they decided to make the DH-88 a biplane? When the DH-88 was designed monoplanes were still rare. There was more experience with biplanes

Or what if they decided they needed four engines to carry the weight of the aircraft and the fuel?

Just some ideas to entertain you!