Complex sentence: Rooney's company aimed many of its products at blacks in the midwest, and his interest in standardized testing was piqued when he discovered that white insurance salesmen were passing the licensing exam in Illinois in large numbers but black salesmen were not.
Split into simpler sentences: Rooney's company aimed many of its products at blacks in the midwest. His interest in standardized testing was piqued when he discovered that white insurance salesmen were passing the licensing exam in Illinois in large numbers but black salesmen were not.