When using a field value variable with a Workflow Action, the exclamation mark (!) will escape the data. A
Workflow Action is a custom action that performs a task when you click on a field value in your search
results. A Workflow Action can be configured with various options, such as label name, base URL, URI
parameters, post arguments, app context, etc. A field value variable is a placeholder for the field value that will
be used to replace the variable in the URL or post argument of the Workflow Action. A field value variable is
written as fieldname, where field_name is the name of the field whose value will be used. However, if the field
value contains special characters that need to be escaped, such as spaces, commas, etc., you can use the
exclamation mark (!) before and after the field value variable to escape the data. For example, if you have a
field value variable host, you can write it as !$host! to escape any special characters in the host field value.
Therefore, option B is the correct answer.