The argument is about how the Internet has allowed businesses to hire professionals from anywhere in the world. The idea is that because of this, the costs of IT services are likely to go down. The missing part of the argument is why this would happen.
A. "the budgets of companies for the use of external services have decreased"
This doesn't explain why the costs of IT services would drop; it talks about companies' budgets decreasing, which might
actually suggest a different outcome.
B. "the professionals offering services through the internet are often not very experienced"
This provides a negative attribute about the professionals, but it doesn't directly explain why the costs would go down.
C. "a language barrier still prevents the cooperation of many businesses with foreign professionals"
This introduces a potential obstacle (language barrier), but it doesn't directly address why the costs of IT services would decrease.
D. "the prices of consumer products have recently dropped"
This talks about a different category (consumer products) and doesn't provide a reason for the costs of IT services to drop.
E. "the competition in the global services market will surely lead to price reduction"
-because there is more competition in the global services market (many professionals from around the world offering their services), it will lead to a reduction in prices. In simpler terms, when many professionals are competing for work, they might lower their prices to attract more customers. So, option E provides a logical reason for why the costs of IT services might drop.
IMO-E