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The relational model of data was first proposed at IBM Research in 1970 by:

ACraik
BCodd
CCobol
DCabot
Answer & Solution
Correct answer: B. Codd
1. The model rests on the mathematics of sets. 2. One researcher set it out formally. 3. That researcher was Edgar F. Codd. _Source: OpenStax Introduction to Computer Science, Chapter 8, Data Management._
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