in my opinion, I wouldn't use any of them, it's only best if you use the book itself. Both the website and the college paper are formed on people's opinions. If this was something that was given to you as a test question, your best bet would be the college paper. The college paper would be filled with Shakespeare's theme and symbolism and some of these themes that he uses are usually not easy to find, especially is your reading the modern version.
The given angles sum to less than 90°, so the remaining angle must be more than 90°. (The total of all angles is 180°.) Triangle ABC has an angle greater than 90°, so is obtuse. Since the triangles are similar, their corresponding angles are congruent. Hence ...
.. D. Triangle XYZ is obtuse.
1 because college has effects that can last your whole life. All of the rest of the answers are short term.