Specific heat of a substance tells us how much heat should be added/removed from it to change its temperature by 1° C.
And here, both objects have same masses and painted black, so we have to find out which one of them have higher specific heat if Object A is hotter than Object B after 10 minutes of exposure.
As we know, If an object has more specific heat it needs more energy to heat up, but value of specific heat is low for a object which get heated up easily.
And since object A gets more hotter than object B in the same time inverval and same mass, we can conclude that object B has higher specific heat.
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