In science, jill is learning about solids such as brass, bronze, and steel. how should she classify these materials? a) pure substances b) state compounds c) homogeneous mixtures d) heterogeneous mixtures

All of these are alloys, and last I checked, alloys are the ONLY solids classified as homogenous mixtures, so C, hope this helps.

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Jill needs to classify these solids like brass, bronze, and steel as Homogeneous  mixture-- Solid in Solid 

Explanation :
1. Brass is a mixture of copper and Zinc which is considered as Solid in Solid. 
2. A homogeneous mixture is the one which has a uniform composition thought its mass.
3.  The components are cannot be distinguished from one another. 
4.  Homogeneous mixtures are also called as true solution.