<span>Mi primo y yo conocemos a los jugadores del Real Madrid. Ellos son espanoles.
C. son espanoles
You need to use <em>son </em>because it is third person plural. You also need to use <em>espanoles </em>because it is plural masculine form. </span>
"Esta en el Mercado de Artesanias"
Much, or many, or very depending on context
I think it’s A, I’m not too sure