When two or more substances are combined, what happens?

When two or more substances are combined, they physically mix together, but the elements that make up each substance remain the same. This means that the original elements do not lose their properties to create a new substance, nor do they dissolve into each other. Therefore, the correct answer is B. Option A is incorrect because the substances do not create a new substance, but rather a mixture. Option C is incorrect because not all substances are capable of dissolving in each other. Option D is incorrect because the substances do not lose their properties, but rather maintain them in the mixture.