thin flaky sheets and very hard glassy texture and a shiny black color very rough texture with obvious crystals sand-sized particles and a light brown color
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: During a walk through the Arkansas River Valley, Alex found a rock that she determined was a sedimentary rock. Which characteristics of the rock would lead Alex to this conclusion?
Possibilities:
- thin flaky sheets and very hard
- glassy texture and a shiny black color
- very rough texture with obvious crystals
- sand-sized particles and a light brown color

sand-sized particles and a light brown color