Final answer:
Granny's exclamation "Ahh! Jethro's done got married!" suggests that her emotional reaction is one of surprise, indicated by both the interjection 'Ahh!' and the use of the exclamation mark. The correct option is B.
Step-by-step explanation:
The emotional reaction of Granny in the statement "Ahh! Jethro's done got married!" can be interpreted as one of surprise.
The interjection "Ahh!" followed by the exclamation indicates an emotional response that is typically associated with being taken aback or startled.
In the context of the sentence structure and punctuation used (exclamation mark), with no other contextual information suggesting a different emotion.
It's reasonable to conclude that Granny's exclaimed response signifies a surprise rather than joy, disapproval, or relief. The correct option is B.