The correct answer is: A. Drive
Google Drive is a file storage and synchronization service developed by Google. It allows users to store files in the cloud, synchronize files across devices, and share files. Google Drive offers a free plan with 15 GB of storage, and paid plans with up to 30 TB of storage.
SkyDrive was a file hosting service and synchronization service operated by Microsoft as part of its web version of Office. It allowed users to store files in the cloud, synchronize files across devices, and share files. SkyDrive was rebranded as OneDrive in 2014.
Dropbox is a file hosting service operated by Dropbox, Inc. that offers cloud storage, file synchronization, personal cloud, and client software. Users can store files in the cloud, synchronize files across devices, and share files. Dropbox offers a free plan with 2 GB of storage, and paid plans with up to 30 TB of storage.
Therefore, the only service provided by Google for online storage is Google Drive.