Refer to the Exhibit

Refer to the exhibit. Pipenv is used to manage dependencies. The test runs successfully on a local environment. What is the reason for the error when running the test on a CI/CD pipeline?

A) All the unit tests in testsum.py failed.
B) Pytest did not detect any functions that start with 'test_'.
C) The pipfile in the local environment was not pushed to the remote repository.
D) Nose2 was not used as the test runner.