Answer:
The word that signals a sequence text structure is b. finally.
Step-by-step explanation:
In order to organize the oral or written speech, an author may use a wide variety of connectors that will show the type of relationship between the words and sentences he or she is using. If the author wants to show similarity, he may use phrases like similarly (c), in the same way, etc.; if he wants to show a cause-and-effect relationship he may use since (d), because, therefore, etc.; if he wants to show correlativity he may use both (a) or not only...but also; if he wants to show a sequence text structure, he may use first, second, next, first of all, before, or finally (b.)