Where is the context data stored when variables are passed through in survey invitations?

When variables are passed through in survey invitations, the context data is stored on the survey response record. This is critical because it enables the system to link the specific responses to the details provided in the invitation, facilitating a deeper understanding of the respondent's answers in the context of the variables that were passed.

Storing the data at the response level allows for accurate tracking of how specific variables can influence survey results, ensuring that responses can be analyzed with respect to the context they were collected in. This is particularly important for meaningful data analysis and report generation.

The other options focus on different locations for data storage, but they do not accurately capture the dynamic interaction between an invitation and the collected responses. For instance, while the survey invitation may include initial context, it's the survey response record that captures how that context influences the answers provided by respondents.