Combine the following sentences into a single compound sentence:
The gauge was below E. Archie worried he would run out of gas. Betty worried, too.
Since the gauge was below E, Archie worried he would run out of gas, and so did Betty.
The gauge was below E, which made Archie and Betty worry that they would run out of gas.
The gauge was below E; consequently, Archie and Betty worried they would run out of gas.
Archie and Betty worried they would run out of gas because the gauge was below E.