Explanation

The composition of igneous rock is primarily determined by the composition of the parent magma, but cooling rate (related to depth) affects texture, not chemical composition. However, in many basic geology contexts, 'composition of molten magma' is the direct determinant. Wait, let's re-evaluate. The chemical composition of the resulting rock is directly inherited from the magma. Depth affects crystallization sequence and texture (intrusive vs extrusive), but the bulk chemical composition is defined by the magma. However, fractional crystallization and assimilation can alter composition during ascent/cooling, which are depth/pressure dependent. But typically, the primary determinant is the magma's composition. Let's look at standard MCQs for this. Often, 'Composition of molten magma' is the expected answer. But some sources might argue 'Both' if considering differentiation. However, B is the most direct and standard answer. I will stick with B as correct. Wait, the prompt asks to verify. If B is correct, I should output true. Let's double check. Igneous rock composition = magma composition. Texture = cooling rate (depth). So B is correct. The current answer is B. So isCurrentAnswerCorrect should be true. Confidence high.