Sancia's class is studying rocks and minerals. sancia has found this rock on the school playground. "i think this rock is made of mostly one mineral," said sancia's teacher. she gave sancia the mineral chart you see here. what evidence would be of little use to sancia? what characteristic would be most useful to her when classifying the mineral?
a) least useful - color; most useful - streak
b) least useful - hardness; most useful - color
c) least useful -streak; most useful - hardness
d) least useful - hardness; most useful - cleavage