ISTQB testing questions

How does testing contribute to software quality?
A. Testing ensures that the system under test will not error out in a
production environment.
B. Testing identifies defects which ensures a successful product will
be released to market.
C. Testing increases the quality of a software system by avoiding
defects in the system under test.
D. Testing through verification and validation of functionality
identifies defects in the system under test.

What is integration testing?
A. Integration of automated software test suites with the application
under test.
B. Testing performed to expose faults in the interaction between
components and systems.
C. Testing to verify that a component is ready for integration with
the rest of the system.
D. Testing to verify that the test environment can be integrated with
the product.