1 application just has only 1 Job Posting. But 1 Job Posting may have many applications. Application does not need to standalone, so Job Posting-Application is a one-to-many master-detail relationship. And the master-detail relationship field is created on the detail side (Application). The answer isCreate a master-detail relationship in the Application custom object to the Job Postings custom object
If create a master-detail relationship in the Job Posting, just one Application can be related to Job Posting. If others candidates desires aplly yours Application to same Job Posting, they are won't be able.
Por isso a resposta correta é:
Create a master-detail relationship in the Application custom object to the Job Postings custom object.
The question is a bit confusing but it seems to be asking how will it be possible for different people to apply to one job posting. If this is the case, then the job application can be arranged in such a way that this will be possible. The job application should be open to different qualified candidates who will submit their job application there.
The fact that all of the job applications will be available there can make it easier for the company to check out the different credentials of the candidates. Those who are not qualified can be removed and those who have the right credentials and personality may score an interview with the company. This will definitely make screening candidates easier and faster.