What is added to form the polymer below? 
Definitions:
Higher Education
Education provided by universities and colleges, typically following completion of secondary education, leading to degrees at various levels.
Official History
The version of historical events that has been documented and sanctioned by authoritative bodies, often taught in educational institutions.
Symbolic Interactionism
A theoretical perspective in sociology that focuses on the ways in which individuals interpret and give meaning to social interactions, symbols, and processes in their everyday lives.
Similar Social Circumstances
Conditions in which individuals or groups live under comparable social and economic conditions.
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