Rigorous is used in the passage which means the syllabus for the course requirement is harsh and rigid.
What is rigorous?
Rigorous is a word that depicts something extreme and tough that needs to be strictly adhered to and abide by to perform the task and reach the goal to be achieved.
In the passage, the word rigorous is used so to compare and detail that the course for Shakespeare's tragedies will be challenging as there will be a lot of assignments, projects, homework, and tests.
Therefore, option 2. harsh and option 3. rigid are the most similar to the word rigorous.
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