By the french language.
After the Norman invasion and conquest of Britain, they were subject to change the official language to french and english was no longer allowed nor spoken on court. This is also the reason for some french words in the english language nowadays.
A humorous essay spreads a humorous message, It's supposed to be entertaining.
The third option is correct: "Art and math are courses architecture students must have on their schedules."
The other two uses the word "their" when referring to a single thing/person. The correct word should be: "Each architecture student must plan his/her high school and college courses carefully." and "Every school of architecture sets its own specific requirements."
