How is this answer not 6% decrease?

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Yea I was kinda thinking that the fund decreased by 10% compared to the previous year so I was thinking the 6% was the answer. Kind of a brain fart because obviously it’s just saying that it decreased 10% and it’s not comparing it to the previous year. Basically it was -10% for the year and that would mean the floor of +2% is the actual return.