Trying to run a Node.js application

Question:
You are tasked with deploying a Node.js application. The application uses the given package.json file. You attempt to start the application, but it crashes with the Cannot find module 'express' error message. Which of the following statements is the most likely cause of the crash? (Choose one.)

{
  "name": "API Gateway",
  "version": "1.0.0",
  "description": "API gateway application",
  "main": "app.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "node app.js"
  },
  "dependencies": {
    "express": "~5.1.0",
  }
}

1. Faulty application code, probably in the express module
2. The package.json file misses and does not declare the express module dependency
3. The application requires tests to be implemented before it can run
4. The deployment process is likely missing the npm install step. The application declares dependent on the express module, but the module is not present when you execute the application

Answer:
D - is the correct answer