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To retain a design across features, agile methodologies encourage ______________ to adapt the code base as needed.

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To retain a design across features, agile methodologies encourage ______________ to adapt the code base as needed.

(a) Changing

(b) Adapting

(c) Refactoring

(d) Duplicating

I had been asked this question in exam.

This question is from Functional Software Testing in chapter Software Testing Principles of JUnit

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Right option is (c) Refactoring

For explanation I would say: Unit tests tells when and where code breaks and gives the confidence to refactor.

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