Option A because the environment should be selected for which the changes are to be applied. In a time Force IDE has many project environments for example maybe a java project and C++ project would be there on sandbox, so the environment selection is important.
Option B because the related changed sets should be specified so that other developers that have access to the project can see the changes being made.
Option D The data fields that are needed to be deployed should also be provided so that the updated version can be seen by other developers.
Rejected Options :
Option C user name and password has nothing to do with the production environment because if the user has it only then it can come and make changes.
Answer:
Tab isolation
Explanation:
Tab isolation is a feature of the browser that works to protect your data from malware. its uses to enhance the reliability of the browser by considering the impact of the crash.
A browser without the tab isolation can be crash fully due to the crashing of one tab. this feature helps to recover the previous opening tab after crashing while on the previous version of the browser if one tab crashes then it automatically crashes all other tabs.
When adding a header, you need to double tap the top of the document.
I can't get what do you need, but I guess it's a part of java code. I can explain what it means. It's used to unite two rising sorted arrays which are list1 and list2. The result is stored in result array. I suggest you to clearly explain your task as it's difficult to give you correct answer.