Final answer:
The style in question is eclectic, utilizing a diverse range of influences. While jazz is an influential style with blues characteristics, the question points towards a broader, modern compositional approach that defies simple categorization, leading to the choice of 'Modern' as the answer.
Step-by-step explanation:
The style described in the provided text is eclectic, which indicates a broad and diverse range of influences rather than adherence to a single style. Noteworthy to the subject at hand, jazz, for instance, emerged as an innovative and influential style during the Harlem Renaissance, reflecting the cultural experiences of African Americans, and incorporated elements of blues with its distinctive chords and blue notes. However, based on the description provided in the question, which emphasizes the integration of international folk materials and modern compositional techniques, it's clear that the style being described does not fit neatly into one of the categories offered as choices (Classical, Folk, Modern, Jazz). It suggests a broader, more encompassing approach that defies simple categorization, but for the purpose of the question's format and closest alignment, Modern is the most fitting choice given its inclusive and evolving nature.