Arrange the following guerrilla marketing tactics in the order of their subtlety, from the least subtle to the most subtle:
A. Flash Mobs
B. Ambient Advertising
C. Street Art
D. Viral Videos
What is the correct sequence of subtlety?
1
B, A, C, D
2
A, D, C, B
3
D, A, B, C
4
C, A, B, D