Answer:
Consequently we communicate in ways that were unimaginable 30 years ago is the correct answer.
Step-by-step explanation:
Transitional words are used to show readers the link between different phrases in a text or in a speech; some examples are and, because, but, etcetera. Consequently is another example, and it means that something happened as a result of another thing. In the question, the first event is how technology advances and the new devices that have been developed; this is linked to the second part of the statement (unimaginable ways of communication 30 years in the past) since it is a consequence or a result of the first action.