______ the seismograph detected unusual tremors, residents of the coastal town began evacuating to higher ground.
Which choice completes the text so that it conforms to the conventions of Standard English?
- A
And
- B
However
- Ccheck_circle
Because
- D
Therefore
Explanation
"Because" introduces a dependent clause showing cause, properly preceding the main clause with a comma. The others are coordinating conjunctions or adverbs requiring different structures.