The right explanation

{"params":{"content":{"task":"<p>Match the expressions to the correct explanation (A\u2013F).<\/p>\n","blanksList":[{"correctAnswerText":"ensure sth."},{"correctAnswerText":"escalate sth."},{"correctAnswerText":"apologize for sth."},{"correctAnswerText":"follow sth. up"},{"correctAnswerText":"back sth. up"},{"correctAnswerText":"work oneself up"}],"blanksText":"<p><strong>A.<\/strong> to make sure that something happens or is definite:<br>\n<span>_________<\/span><\/p>\n\n<p><strong>B.<\/strong> to involve a higher-ranking person in a situation or problem:<br>\n<span>_________<\/span><\/p>\n\n<p><strong>C.<\/strong> to say that you are sorry for doing something wrong or causing a problem:<br>\n<span>_________<\/span><\/p>\n\n<p><strong>D.<\/strong> to take further action in addition to something that you have already done:<br>\n<span>_________<\/span><\/p>\n\n<p><strong>E.<\/strong> to support something; to give evidence that what you say is true:<br>\n<span>_________<\/span><\/p>\n\n<p><strong>F.<\/strong> to get into a state of great excitement, anger, etc.:<br>\n<span>_________<\/span><\/p>\n"},"overallFeedback":[{"from":0,"to":100}],"behaviour":{"mode":"selection","selectAlternatives":"all","selectAlternativeRestriction":0,"spellingErrorBehaviour":"mistake","caseSensitive":false,"autoCheck":false,"enableSolutionsButton":true,"showSolutionsRequiresInput":false,"enableRetry":true,"enableCheckButton":true,"disableImageZooming":false,"confirmCheckDialog":false,"confirmRetryDialog":false},"showSolutions":"L\u00f6sung anzeigen","tryAgain":"Wiederholen","checkAnswer":"\u00dcberpr\u00fcfen","notFilledOut":"Bitte f\u00fclle alle L\u00fccken aus, um die L\u00f6sung zu sehen","tipLabel":"Tipp","spellingMistakeWarning":"\u00dcberpr\u00fcfe die Rechtschreibung: @mistake","scoreBarLabel":"Du hast :num von :total Punkten erreicht.","confirmCheck":{"header":"Beenden?","body":"Ganz sicher beenden?","cancelLabel":"Abbrechen","confirmLabel":"Beenden"},"confirmRetry":{"header":"Wiederholen?","body":"Ganz sicher wiederholen?","cancelLabel":"Abbrechen","confirmLabel":"Best\u00e4tigen"}},"metadata":{"title":"The right explanation","license":"U"}},