To answer this question, you need to understand the different types of testing performed during the software development process.
Option A) Unit testing - This option is incorrect because unit testing is performed by developers on individual units or components of the software to ensure that each unit functions correctly.
Option B) Regression testing - This option is incorrect because regression testing is performed to ensure that changes or updates to the software did not introduce new bugs or issues in previously tested functionality.
Option C) Alpha testing - This option is correct. Alpha testing is a type of testing performed at the developing organization's site. It is usually the first phase of testing and involves testing the software in a controlled environment by a group of internal users or testers.
Option D) Integration testing - This option is incorrect because integration testing is performed to test the interaction between different components or modules of the software to ensure they work together correctly.
The correct answer is C) Alpha testing. This option is correct because alpha testing is performed at the developing organization's site as the initial phase of testing.