An advantage of aluminum pistons, when compared to cast iron pistons is （）.<br>A:greater high temperature strength<br>B:better heat conductivity<br>C:greater weight per cubic inch<br>D:increased resistance to wear

An advantage of aluminum pistons, when compared to cast iron pistons is （）.
A:greater high temperature strength
B:better heat conductivity
C:greater weight per cubic inch
D:increased resistance to wear

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