WE MIGHT RAISE OUR HAND AND WAVE TO OUR FRIEND AS A _________ THAT WE SEE HER OR HIM

4. - DE THI TUYEN TIENG ANH 12 NHE
DE THI TUYEN TIENG ANH 12 NHE

4. We might raise our hand and wave to our friend as a _________ that we see her or him.

A. signature B. sign C. signal D. sigh