During WWII, which innovative tank design feature was specifically developed to overcome the product failure of earlier models when facing the superior German Panzer tanks in North Africa?

Throughout military history, product design and development has played a crucial role in determining battlefield success. From ancient weapons to modern combat systems, the process of designing, testing, and deploying military equipment has evolved dramatically. This poll tests your knowledge about a significant product development challenge that changed the course of military history during World War II.

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The Christie suspension system that allowed tanks to travel at higher speeds across rough terrain
The 17-pounder anti-tank gun, which required a complete redesign of the turret to accommodate its size
Sloped armor plating that increased effective thickness without adding weight
Diesel engines that reduced the risk of catastrophic fires when hit by enemy fire