They are complete bull!
Any question with all of the above or some of the above as the answer DO NOT test what you know. Instead they test how well you are able to write a multiple choice test.
And when all the answers are right, but you must choose the best answer! What balony! You know that they are all right and you would be able to put that into practice, but now you have to choose the MOST right.
STUPID!

tests in the Canadian education system do not accurately test our knowledge, but rather our ability to eliminate less correct answers.