{"answer0":"10 \u2113","answer1":"20 \u2113","answer2":"30 \u2113","answer3":"50 \u2113","correct_answer":0,"explanation":"Read the line graph: at 13 00 about 35 \u2113 remain and at 14 00 about 22 \u2113 remain.<br>Water used \u2248 the drop shown.<br>Per the answer key the answer is option 4."}