I think the best answer would be D. Dolphin!
When in doubt pick C I don’t really know the answer but I just pick C
1,516.31168 grams of Magnesium Hydroxide
273g/25 mL = 10.92 (that's the density)
What has a density of 10.92 grams/mL? I don't know but I bet it's in your notes or on the worksheet.