Answer:
where is underline? how can I tell without underline?
A. The president can veto a bill passed by Congress.
The passage states how the birthmark on Georgiana's cheek causes her to be "countenance even hideous" therefore the answer is B). the birthmark on Georgiana's cheek.
The technique of alliteration is being used. Alliteration is the occurrence of the same letter or sound at the beginning of closely connected words.