Question 3 refers to the following passage:
Schools are encouraging families to get into debt.
The rise of the American-style school ‘prom’ has become a £100 million industry in the UK.
Many schools are using the prom as a way of celebrating good attendance and behaviour in Year 11 and/or Year 13.
Schools promote proms as a memory-making event. According to MoneyWise.co.uk, in 2014, the average cost of attending a school leavers' ball or high school prom was a huge £186, whereas the average national weekly income, after tax and National Insurance, in 2014 was merely £379.
Schools are aware that students and their families spend too much on the proms.
This is shown by the results of a Holiday Inn survey in 2011, which showed that one in 10 people spent more than £500 on their school prom and 2% spent more than £1500.
Which of the following is an assumption used in the above argument?