Trade in Services Is Less 'Visible' Than Trade in Merchandise

Multiple Choice

Trade in services is less 'visible' than trade in merchandise because:

A) the value of services is more difficult to measure.
B) services lower valuation makes them less important and thus less visible.
C) the study of services is older and needs to be studied less.
D) services are such a small percentage of GDP.
E) Service imports cannot be counted accurately.