Festoon means basically to decorate so I want to say the answer is A
I believe it would be that the bride is not happy with her marriage. She is told she should be thankful, but she it's quite obvious she's discontent. (This may be slightly opinionated, but that's the best answer i can give. hope this helps)
Deductive reasoning is taking something general to something specific. For example, if all cats have hair, then your cat has hair.