how is stained glass made?\na. adding metallic oxides to sand and ash or lime, then infusing at high…

how is stained glass made?\na. adding metallic oxides to sand and ash or lime, then infusing at high temperatures\nb. adding metallic oxides to salt, then infusing over time at low temperatures\nc. adding metallic oxides to sulfur, then infusing at high temperatures\nd. adding metallic oxides to sulfur, then infusing at low temperatures\n\nplease select the best answer from the choices provided\n\n○ a\n○ b\n○ c\n○ d
Answer
Brief Explanations:
Stained glass is made by adding metallic oxides to a glass - making base (sand, ash or lime are typical components of glass) and then infusing at high temperatures. Option a describes this process. Option b uses salt and low temperatures which is incorrect. Option c and d use sulfur which is not part of the standard glass - making base for stained glass.
Answer:
A. adding metallic oxides to sand and ash or lime, then infusing at high temperatures