When Setting Up an AdWords Account, Choose Your Currency and Permanent

Multiple Choice

When setting up an AdWords account, choose your currency and permanent time zone carefully because:

A) Time zone and currency will impact ad position.
B) Ads are only served in countries using the same currency as your account.
C) These cannot be changed once you've set up your account.
D) By default, ads are only served in the same time zones as indicated in your account.