Select the most correct statement about unit testing and integration tests? $-$ unit tests focus on individual components or functions of a software, while integration tests evaluate the interaction between different parts of the software $-$ unit tests are performed by DevOps teams, whereas integration tests are conducted by quality assurance teams. $-$While integration tests look at database interactions, unit tests solely test the user interface, $-$ both unit tests and integration tests serve to assess the entire software system, therefore they are fundamentally equivalent. $-$ Performance testing is done with unit tests, and security vulnerability testing is done with integration tests. Pick from these five options the most correct statement and fact check it with a credible source.