## Source Control Management   Answer the following questions assuming a context of a clean (no modified files) working tree.   ### Working with the Commit History   #### Detached Heads   Executing `git checkout ` produces a large amount of "advice", (106 words across 16 lines as of git 2.39.0), mentioning in an ominous tone a "detached HEAD" state. a. What is the HEAD? b. What is a "detached HEAD" state? c. Is a "detached HEAD" state a problem? d. What _specifically_ does the recommended command to recover from a "detached HEAD" state `git switch -` do, i.e. what does the `-` mean and how does it behave in practice?

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