What is the command to merge a branch into the master branch in Git?

• A. git combine new-branch
• B. git merge new-branch
• C. git add new-branch
• D. git checkout new-branch

Answer: (B)

The command to merge a branch into the master branch in Git is indeed accomplished using "git merge new-branch." When you run this command, Git takes the changes from the specified branch—in this case, "new-branch"—and integrates those changes into the currently checked-out branch, which would be the master branch if it has been checked out prior to this command.

This merging process will create a new commit on the master branch that combines the changes from both branches, allowing you to incorporate new features or fixes developed in the "new-branch" into the main line of development. This is a key feature of version control systems like Git because it supports collaboration and streamlines the integration of contributions from different branches efficiently.

The other options do not represent the correct method for merging branches in Git. For example, "git combine new-branch" is not a valid command in Git, and "git add new-branch" is used for adding changes to the staging area rather than merging branches. Similarly, "git checkout new-branch" is a command to switch to the "new-branch" without performing any merging actions on the master branch.