public function process_ma($xml, &$questions) {
        if ($this->getpath($xml, array('POOL', '#', 'QUESTION_MULTIPLEANSWER'), false, false)) {
            $maquestions = $this->getpath($xml,
                    array('POOL', '#', 'QUESTION_MULTIPLEANSWER'), false, false);
        } else {
            return;
        }

        foreach ($maquestions as $thisquestion) {
            $question = $this->process_common($thisquestion);

            $correctfeedback = $this->getpath($thisquestion,
                    array('#', 'GRADABLE', 0, '#', 'FEEDBACK_WHEN_CORRECT', 0, '#'),
                    '', true);
            $incorrectfeedback = $this->getpath($thisquestion,
                    array('#', 'GRADABLE', 0, '#', 'FEEDBACK_WHEN_INCORRECT', 0, '#'),
                    '', true);
            $question->correctfeedback = $this->cleaned_text_field($correctfeedback);
            // As there is no partially correct feedback we use incorrect one.
            $question->partiallycorrectfeedback = $this->cleaned_text_field($incorrectfeedback);
            $question->incorrectfeedback = $this->cleaned_text_field($incorrectfeedback);

            $question->qtype = 'multichoice';
            $question->defaultmark = 1;
            $question->single = 0; // More than one answers allowed.

            $choices = $this->getpath($thisquestion, array('#', 'ANSWER'), false, false);
            $correctanswerids = array();
            foreach ($this->getpath($thisquestion,
                    array('#', 'GRADABLE', 0, '#', 'CORRECTANSWER'), false, false) as $correctanswer) {
                if ($correctanswer) {
                    $correctanswerids[] = $this->getpath($correctanswer,
                            array('@', 'answer_id'),
                            '', true);
                }
            }
            $fraction = 1 / count($correctanswerids);

            foreach ($choices as $choice) {
                $choicetext = $this->getpath($choice, array('#', 'TEXT', 0, '#'), '', true);
                // Put this choice in the question object.
                $question->answer[] = $this->cleaned_text_field($choicetext);

                $choiceid = $this->getpath($choice, array('@', 'id'), '', true);

                $iscorrect = in_array($choiceid, $correctanswerids);

                if ($iscorrect) {
                    $question->fraction[] = $fraction;
                } else {
                    $question->fraction[] = 0;
                }
                // There is never feedback specific to each choice.
                $question->feedback[] = $this->text_field('');
            }
            $questions[] = $question;
        }
    }