Which engineers first conceived the Eiffel Tower's very tall pylon design?

• A Emile Nouguier and Maurice Koechlin ✓
• B Gustave Eiffel and Auguste Bartholdi
• C Stephen Sauvestre and Eugene Viollet-le-Duc
• D I. M. Pei and Hector Guimard

Nouguier and Koechlin developed the initial concept in 1884.