__ testing is done to decrease the chances of any kind of risk in the product. a. Risk-based Testing b. bug-free c. assumptions d. high-quality code example

Example: risk based testing

Risk based testing: When there is no time to do whole
regression testing, you only test the parts that matters, that
is related
Testing without requirements: Production defects
usually don't have any requirements and I talk to developer
to understand the situation better and then test it.