Which statement about Jest, Vitest and Node's built-in test runner is correct?

"Node's node:test module ships with Node, runs with node --test, and includes mocking helpers such as mock.fn()" is correct. node:test has been stable since Node 20. It gives you these with no extra dependency:
• test and describe
• mock.fn() and mock.method()
• timer mocks

The other statements are wrong:
• "Vitest can only test code built with Vite" is false. Vitest is a general-purpose runner, and it works for plain Node code.
• "Jest runs all test files one after another in a single process" is false. By default, Jest runs test files in parallel, in worker processes.