Which of the following statements describe why exploratory testing is a useful test design technique?
A. It can help derive test cases based on the internal structure of systems.
B. It is useful when there are limited specification documents available.
C. It is useful when there testing is constrained due to time pressures.
D. It is a cheaper alternative to more formal test design techniques.
A. b and c
B. a and c
C. b and d
D. c and d