var _CoAn1="<ol><li>sulfate aerosols, marine cloud brightening, solar shield (all three could balance any CO<sub>2</sub> forcing)</li><li>BECCS (estimated two-thirds of a doubled CO<sub>2</sub> forcing by 2100)</li><li>iron fertilisation (estimated 8% of a doubled CO<sub>2</sub> forcing by 2100)</li><li>urban albedo (estimated 1.3% of a doubled CO<sub>2</sub> forcing).</li></ol>"

,data = {
    rowHeaders:[
        {text: "1"},
        {text: "2"},
        {text: "3"},
        {text: "4"}
    ],
    choices: [
        {text: "sulfate aerosols"},
        {text: "urban albedo"},
        {text: "BECCS"},
        {text: "marine cloud brightening"},
        {text: "iron fertilisation"},
        {text: "solar shield"},
    ],
    answers: [
        {text: ["sulfate aerosols", "td0"]},
        {text: ["urban albedo", "td3"]},
        {text: ["BECCS", "td1"]},
        {text: ["marine cloud brightening", "td0"]},
        {text: ["iron fertilisation", "td2"]},
        {text: ["solar shield", "td0"]}
    ],
    feedback: [
        {text: "<p>Your answer is correct. The rank order is:"+_CoAn1},
        {text: " Your answer is incorrect. Wrong answers have been removed. Try again."},
        {text: " <p>Your answer is still incorrect. The correct answers are now shown. </p><p>The correct rank order is:"+_CoAn1+"</p>"}
    ]
};