Task: Question Answering
Input (English): Students have a rock sample that may contain the mineral hematite. They know that hematite has a red or rusty streak. How can the students determine the color of the streak in the rock sample?  
 (A) use a rock with the known mineral to strike the sample (B) rub the sample on a piece of unglazed clay tile (C) use a file to break off a piece of the sample (D) scratch the sample with an iron nail
Output (English): B