Detergent is more efficient than soap in cleansing clothes and dishes because of the following reasons except that ____________

A. the corresponding \(\mathrm{Ca}\) and \(\mathrm{Mg}\) compound formed is soluble in \(\mathrm{H}_{2} \mathrm{O}\)
B. detergents are not affected by hardness of water
C. it cleans better than soap
D. it is less expensive  

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Correct Answer: D