Câu 3
KIZSPY
According to Steffi Decker, senior partner at Chong and Koster; how much should a Facebook advertiser spend on testing?
A. 20% budget for testing, the remaining 80% for scaling the testing result
B. 80% budget for testing, the remaining 20% for scaling the testing result
C. 50% budget for testing, the remaining 50% for scaling the testing result
D. 70% budget for testing, the remaining 30% for scaling the testing result
