A.
Medium is
a way in which an artist creates a work o
b. the material of a work of art.
c. the use of more than one tool to create a
d. made from ground up solids that contain

C, the use of more than one tool to create art

Explanation:

Like painting, or digital art, those are two different mediums of art, to different ways of doing one thing, another example would be, Oil pastels and Graphite, hope this helps

what do you think? it needs to be explanatory. then answer the question  

i think this is true