The kind of data source is not known. Results may be invalid because some internet websites don’t upgrade their formats to the latest one. A lot of important details may also be missing from internet sites since some of their formats are incorrect while their data cannot be used as resource in some statistic software.
Answer:
B) quota
Explanation:
A quota is a trade constraint imposed by government, which confines a nation's import or export within a certain period, or the amount or monetary value of the products. Nations use quotas to control trading volumes between them and the other nations in global trade. A tariff would put taxation on the Chinese's exports and it doesn't favour them.
Answer:
what do you mean did our scores improve, if so, idk yet
I would definitely be weary. If you can't answer if they're valid on your own, it's probably not!