You have an on-premises server that contains a folder named D:\Folder1. You need to copy the contents of D:\Folder1 to the public container in an Azure Storage ...

The azcopy copy command copies a directory (and all of the files in that directory) to a blob container. The result is a directory in the container by the same name.
Incorrect Answers:
B: The azcopy sync command replicates the source location to the destination location. However, the file is skipped if the last modified time in the destination is more recent.
D: The az storage blob copy start-batch command copies multiple blobs to a blob container.
Reference:
https://docs.microsoft.com/en-us/azure/storage/common/storage-use-azcopy-blobs
https://docs.microsoft.com/en-us/azure/storage/common/storage-ref-azcopy-copy