Final answer:
Mats Sundin scored his 500th goal against Miikka Kiprusoff on October 14, 2006, answering the student's question with option c) Miikka Kiprusoff.
Step-by-step explanation:
Mats Sundin of the Toronto Maple Leafs scored his 500th career goal against Miikka Kiprusoff on October 14, 2006. Thus, the answer to the schoolwork question regarding the goalie Mats Sundin scored against to reach 500 goals is c) Miikka Kiprusoff.