So yesterday was the block party show . Overall , it went pretty well . We nailed most of the songs , the ones we did n't were due to power problems . We were working off a 20 or 15 amp outlet , and we were using 5 guitar amplifiers ( 3 for bass and guitars , two for vocals ) .
According to the above context, choose the best option to answer the following question.
Question: Why did they need so many external speakers ?
Options:
A. None of the above choices .
B. To throw a work fiesta .
C. To throw an event at work .
D. To throw a big local fiesta .


D