Final answer:
The word 'Bridge' in the sentence should be lowercase, as it follows the proper noun 'Golden Gate' but is not part of the official title or name.
Therefore, the correct answer is: option 'The word Bridge should be lowercase.'
Step-by-step explanation:
The edit that should be made to correct the sentence 'The golden Gate Bridge spans almost two miles and connects the city of San Francisco with Marin County.' is to lowercase the word 'Bridge.'
Proper nouns should be capitalized, but when a common noun follows a proper noun, it should not be capitalized unless it is part of the official title or name.
Here, 'Golden Gate' is the proper noun and official name, but 'bridge' is a common noun and not part of the official name when used in this context.
Therefore, among the given options, 'the word Bridge should be lowercase' is the correct one.