Magnesium Sulfate Can Be Obtained at a Drugstore as Epsom $\times$

Magnesium sulfate can be obtained at a drugstore as Epsom salts. The monohydrate is found as the mineral kieserite (MgSO₄ - H₂O, 138 g/mol) . What would be the pH of a 500 mL aqueous solution containing 1.62 g of dissolved kieserite? The value for sulfuric acid is 1.2 $\times$ 10^-2.

A) 7.00
B) 6.85
C) 7.15
D) 3.55
E) 12.22