Answer:
Although
Step-by-step explanation:
Although is a conjunction which means 'even if' or 'even though' or 'inspite of the fact', etc.
The basic idea to add although at the beginning of a sentence is to put more emphasis on the main clause.
Hence, option B. Although is the correct answer.
Although the 19th Amendment was added to the Constitution, some states did give women the right to vote.