'Problem structure.'

def get_problem(self):

    xml = dedent('\n                                                                <problem>\n                                                                                <label>Which    of    the    following    countries    has    the    largest    population?</label>\n                                                                                                <multiplechoiceresponse>\n                                                                                                        <choicegroup    type="MultipleChoice">\n                                                                                                                <choice    correct="false">Brazil    <choicehint>timely    feedback    --    explain    why    an    almost    correct    answer    is    wrong</choicehint></choice>\n                                                                                                                <choice    correct="false">Germany</choice>\n                                                                                                                <choice    correct="true">Indonesia</choice>\n                                                                                                                <choice    correct="false">Russia</choice>\n                                                                                                        </choicegroup>\n                                                                                                </multiplechoiceresponse>\n                                                                </problem>\n                                                ')
    return XBlockFixtureDesc('problem', 'TEST    PROBLEM', data=xml, metadata={'max_attempts': 2}, grader_type='Final    Exam')
