There are two possibilities:
1) The most likely is that you are working in the Desktop FormsCentral application that is included with Acrboat Pro XI and the form is "local" as opposed to being "online". Click on the icon in the upper right corner that looks like a person and select "Sign In", sign in with your AdobeID or create a new Free account if you do not have one already. After signing in click on the "Collect and Manage Responses online" tab and click "Move Online" to move the form online, you will then see the Options tab as well as Test, Summary Report and View Responses.
2) Another option is that the form was shared with you and not one that you authored, if a form is shared with you it can be shared at three different permission levels, you may not have permission to modify the options.