Respuesta :

I think the correct answer from the choices listed above is option C. The average salt content of seawater as measured in parts per thousand (ppt) would be 35 ppt. The salinity of seawater is usually 35 parts per thousand in most marine areas. Hope this answers the question.

35 ppt are salt

~Hope this helps~

((C and D both have 35 I can't help you right there))