Final answer:
The Cordilleran and Laurentian Ice Sheets covered Canada during the last glacial maximum, shaping much of the landscape in northern America.
Step-by-step explanation:
The two ice sheets that covered Canada about 18 to 25 thousand years ago were the Cordilleran Ice Sheet and the Laurentian Ice Sheet. During this period, known as the last glacial maximum, these massive ice sheets extended over much of what is now Canada and parts of the northern United States. The Cordilleran Ice Sheet covered what is now the western part of Canada, while the Laurentian Ice Sheet was larger and covered the eastern part, including the area around the Great Lakes and much of northeastern America. This period of glaciation contributed to shaping the landscape as we know it today, forming features such as the Great Lakes and leaving behind a legacy of glacial landforms.
Answer: C) Cordilleran & Laurentian