Who was the only president to take the oath of office aboard an airplane?

The answer is challenging and taxing because arduous means when something is hard and tiring and the excerpt provides clear detail why that's the answer

Provide more information so i can answer your question; )

Tenochtitlán was the capital of the aztec empire. it was a busy and bustling city where“there are daily more than 60,000 souls, buying and selling, and where are found all the kinds of merchandise produced in these countries.” when cortes arrived in 1519, theenormity of the trading market and the smoothness of it’s running both surprised and  impressed him.

Idon’t know what that article is and is there any answer choices?