Where should a second dash be placed in this sentence to punctuate it correctly?
We adopted a dog we have only ever had cats - so I am a
little worried.
A. After "we"
B. After "adopted"
C. After "dog"
D. After "so"

Examine the public service ad. how does this ad transmit a cultural value? by sharing relevant high school graduation statistics by promoting a new type of educational program by reminding the public of the need for new schools by encouraging people to strive for more education