I got an assignment with this question

Your Canada Pension Plan (CPP)/Quebec Pension Plan (QPP) benefit is a contributory pension plan that you receive based on the dollar value of your contributions and the number of years that you contribute to the plan during your employment years. Since your contributions can fluctuate over the years (i.e. loss of employment, years in university), you can exclude certain amounts in order to receive a higher pension. Name three exclusions that you may be eligible for in order to increase your CPP/QPP pension.

Note:

I'm not sure about the other two, but the first one I'm assuming is the pension assignment which is when a married or common-law couple decides to share their CPP retirement pension in order to reduce their income taxes

It's theory which I'm not a fan of I hope somebody can help me with this as it's not so clear in the textbook, thank you!