SINCE HE DID NOT SUPPORT ANY OF THE CANDIDATES, HE DECIDED TO ________...

6: - CAU HOI CHO TIET CHUYEN DE CAP QUAN, HUYEN 2
CAU HOI CHO TIET CHUYEN DE CAP QUAN, HUYEN 2

6:

Since he did not support any of the candidates, he decided to __________.

refrain

delay

abstain

reject