Answer:
B. Clifton, but
Explanation:
The comma use to separate the independent sentence to another independent or dependent sentence.
Independent sentence: we won the games in Silverdale and Clifton
Subject: we
Verb: won
Also independent sentence: but we lost to Jenson after a turnaround in the fourth quarter and two overtimes.
Subject: we
Verb: won
Coordinating conjunction (beginning with a conjunction): but
If you connect the two sentence together, add a comma.
We won the games in Silverdale and Clifton, but we lost to Jenson after a turnaround in the fourth quarter and two overtimes.