Answer:
(a) Run the program with test data to verify the results and trace the source of the problem.
(b) Verify that variable names are spelled correctly.
(c) Search for language that does not follow the programming language conventions.
Step-by-step explanation:
(a), (b), and (c) are all appropriate responses to an error alert. It is important to investigate the error and determine its source to fix the issue and prevent it from happening again.