During the classical period, public concerts were frequently held in <span>B. theaters or halls normally used for other purposes.
These theaters and halls were used for the purpose of plays mostly, but they were repurposed at the time to include musical exhibitions as well. The other options are incorrect because they do not represent the locations where public concerts were held. </span><span /><span>
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Answer:
A or C
Explanation:
They were stone slabs with engravings or carvings meant to give glory to kings, but they also often went above doorways. I would say A though, since they didn't always go above doors. 
 
        
             
        
        
        
Answer: Los profesores de química encontrarán información sobre el origen cósmico de ... Los elementos químicos nos rodean y forman parte de nosotros. ... sé que hoy no existía, porque los átomos, los protones, los neutrones y los electrones serían ... un alto número de protones en el Universo temprano convirtió al hidrógeno en el elemento dominante: el 95%.