Clarissa needs to modify a runtime environment variable that will be set for all users on the system for both new logins as well as new instances of the BASH shell being launched. Which of the following files should she modify? a. /root/.profile
b. /etc/profile
c. /root/.bashrc
d. /etc/bashrc

Clarissa should modify the file /root/.profile.

Runtime environment variables

The Runtime environment variables are defined as the key pairs that are deployed along the function. The variables are mainly scoped to a function in the project.

Therefore, in the context, Clarissa wishes to modify the run time environment variable which can be used for all the new logins and also for the new instances for the BASH shell. So for this, Clarissa should modify the /root/.profile file command.

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The environmental variable is a dynamic-name value, that might alter how the way a computer works. These constitute part of nature where a process is carried.In the Container Management, every value of Environment Variables might be changed or the code that whilst also might be executed during runtime: Throughout the Property of each Environment modifications introduced in the Container Management got saved.

Following are the description of the wrong choice:

In option b and option d, both are wrong because it's file directory.In option c,  it is a software file directory which install in the main disk, that's why it is wrong.

Therefore, the "/root/.profile" file should be changed by Clarissa.

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