What is the definition of upcycling?

Question $6$ options:

a$)$

reuse discarded objects or material in such a way as to create a product of a higher quality or value than the original.

b$)$

reuse discarded objects or material in such a way as to create a product of a lower quality or value than the original.

c$)$

reuse discarded objects or material in such a way as to create a product of a limited quality or value than the original.

d$)$

reuse discarded objects or material in such a way as to create a product that is not higher quality or value than the original.