Hurry plz. no wrong answer .
the of a mineral can vary according to the impurities in that mineral as well as other factors.

a. hardness
b. density
c. luster
d.
color

Which of these statements is true about autotrophs, but not heterotrophs? a. they use sugar and oxygen to make carbon dioxide and water.b. they use chlorophyll and oxygen to make carbon dioxide and water.c. they use sunlight, water, and carbon dioxide to make sugars.d. they use sunlight, water, and oxygen to make chlorophyll.