Which design innovation revolutionized insulin delivery for diabetes patients in the early 2000s by focusing on discrete, user-friendly administration?

The design of medical devices has evolved dramatically over the decades, with user-centered design principles becoming increasingly important. Modern medical product design must balance clinical efficacy, user experience, regulatory compliance, and manufacturing constraints. This poll tests your knowledge about a significant shift in medical device design philosophy that changed how healthcare products are developed worldwide.

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The insulin pen (replacing traditional syringes with a more ergonomic, pre-filled device resembling a writing instrument)
Continuous glucose monitoring implants (eliminating the need for any manual insulin administration)
Voice-activated insulin pumps (allowing hands-free operation through verbal commands)
Dissolvable insulin tablets (replacing injections entirely with oral administration)