Allow filtering of answer options

Currently it is only possible to filter entire questions based on previous answers but you cannot filter answer options of a questions based on previous answers. This would be extremely helpful for brand funnels where you e.g. start by asking awareness of brands and drill down to usage etc. -->it should be possible that you only pipe in brands (answer options) that were selected in previous questions (e.g. if you ask about which brands they use, they should only see the list of brands that they are aware of)