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Crude common salt is hygroscopic because...

Crude common salt is hygroscopic because of impurities of ______________ and _____________ .

A

`CaSO_(4) and MgSO_(4)`

B

`CaCl_(2) and MgCl_(2)`

C

`CaBr_(2) and MgBr_(2)`

D

`Ca(HCO_(3))_(2) and Mg(HCO_(3))_(2)`

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