|Question 21Verbal

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Text
In contrast to first-past-the-post electoral processes, the proportional representation system by which Bolivia's Chamber of Senators is elected begins with citizens casting their votes not for specific candidates but for political parties. _____ once the votes have been tabulated, each party is awarded a number of seats proportional to the number of votes it received.
Which choice completes the text with the most logical transition?
In other words,
A
Conversely,
B
Then,
C
However,
D