Which declare statement has correct syntax?

The correct syntax for declaring a hash object in SAS requires the use of the data= option, which specifies the data source that the hash object will be working with. The correct choice uses the proper syntax for declaring a hash object with the dataset: keyword, which indicates that it is referring to a dataset in SAS.

The option includes the necessary structure for pointing to the dataset by using proper syntax, allowing the hash object to function correctly within the Data Step. The declaration command formats the object as a hash table that will hold the values from the specified dataset.

In contrast, options that use dsn: or lack proper quotes may not adhere to the required SAS language standards, leading to syntax errors. Correct syntax is crucial for SAS programs to execute properly, so adhering to the established conventions is important for successful implementation.