The New Orleans Superdome was built in 1975 to host games between professional football teams. For over four decades, the space has also been used for other sporting and music events. As tourism strengthened the city’s economy, several other convention centers and music halls were built, each competing to be the premier location for profitable conventions and concerts. Many large events are still held at the Superdome, (however.)

a. NO CHANGE

b. though.

c. for example.

d. additionally.