Look at this pair of sentences. Choose from the phrases to complete sentence b with the same meaning as sentence a.
a) In my opinion, it must be user-friendly if we want people to buy it.
b) In my opinion, it can'taren't ableisn't advisable's essential that it’s user-friendly so people will buy it.
К сожалению, у нас пока нет статистики ответов на данный вопрос,
но мы работаем над этим.