Everything else equal, the AC curve will shift downward if

Suppose the world price of widgets is $5 each. If a widget-importing country imposed a $2 per widget tariff, what price would that country's consumers pay for widgets?

A) $10 B) $7 C) $5 D) $3 E) A price that is greater than $5 and less than $7

When two variables repeatedly change at the same time, there must be a causal relationship between them

a. True b. False Indicate whether the statement is true or false