Extra radio button and box after each answer

Hi,

Modified the piece of code below to remove the extra radio button.

Can you pl explain what this piece is doing?

show_survey.php, line 131 onwards

if($ques->allow_user_answer)  {
    echo "<input type='$type' name='answer-{$ques->ID}[]' id='answer-id-{$ans->ID}' class='answer' value='user-answer' />\n";

    if($ques->user_answer_format == 'textarea')
      echo "<textarea name='user-answer-{$ques->ID}' rows='5' cols='30' class='user-answer'></textarea>";
    elseif($ques->user_answer_format == 'checkbox')
       echo "<input type='checkbox' name='user-answer-{$ques->ID}' class='user-answer' value='1' />";
    else
      echo "<input type='text' name='user-answer-{$ques->ID}' class='user-answer' value='' />";
  }

The modification is in the top if statement:
if($ques->allow_user_answer && $type != 'radio')

Not sure if this is going to cause problems elsewhere, though.

https://www.ads-software.com/extend/plugins/surveys/