Which of the following tool can be used for integrating text and code in one document?

The correct answer is A. knitr.

knitr is a document preparation system for dynamic documents. It can be used to create documents that include both text and code, and that can be easily updated as the code changes. knitr is based on the R programming language, and it can be used to create documents in a variety of formats, including HTML, PDF, and markdown.

ggplot2 is a plotting package for the R programming language. It is used to create publication-quality graphics.

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