You can set conditions individually for each field, but it can become challenging to maintain if you want to hide an entire group of questions. Instead of applying conditional settings to each field, you can set the conditions on the first field in the section and enable the Hide this entire section if this field is hidden toggle. This way, the conditions will apply to the entire section, making it more manageable. Here's how:
Navigate to the field you want to be the first in your section, then:
Go to the Section Header section
Enter a Section Header Title
Turn on Hide this entire section if this field is hidden
Go to the Conditional Field section
Add the required condition(s) to show the section. In your example that would be "if field A is not option A" (or "has none of" if you need to add multiple options of the same field).
Conditions can also be stacked, where the section has certain conditions and fields within it have others. The section itself will then only be visible when the header field's conditions are met, but each field within the section will only show when its conditions have been met as well!
Conditional Pages
This option also automatically applies to pages if the multi-page mode is enabled.