Which two choices may be used (if available) to store additional attributes that may not fit into the base package tables/fields without introducing database changes?

Which two choices may be used (if available) to store additional attributes that may not fit into the base package tables/fields without introducing database changes? (Choose two.)
A. Basic Large Object (BLOB)
B. Character Large Object (CLOB)
C. Characteristics
D. custom fields to base package tables
E. custom child table(s) linked to base package parent tables

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