You add a new Composer dependency utilizing composer require. After testing composer install locally, you add the Composer lock and json files and perform a deployment. The build phase fails as Composer is unable to resolve the dependencies.

You add a new Composer dependency utilizing composer require. After testing composer install locally, you add the Composer lock and json files and perform a deployment. The build phase fails as Composer is unable to resolve the dependencies.
Why did this happen?
A. The versions of PHP on your local environment and integration environment differ
B. Your commit needs to contain the updated vendor folder
C. The project cache should have been cleared with the magento-cloud:project-build-cache command
D. You did not execute the install locally with –require-dev

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