You're Managing a Campaign Where Budget Is Unlimited as Long

Multiple Choice

You're managing a campaign where budget is unlimited as long as ROI is positive, but something still limits how much you're able to effectively invest. What is it? Choose the most closely related answer.

A) The value of traffic available for the keywords you're targeting.
B) The number of tracking codes installed on your website.
C) The number of websites on the internet.
D) Whether your payment method is credit or debit.