The amount of office space being built in central London rose by 24 per cent in the six months to the end of March, a survey of construction activity by advisory firm Deloitte found earlier this year — the second-biggest increase in 20 years.
Utilize the input text as a context reference, choose the right relationship between 'Deloitte' and 'London' from the options.
Options: location of formation, member of, owned by, stock exchange