WHAT DOES THE WORD “THEM” REFER TO

4) - DE THI CHON HOC SINH GIOI CAP HUYEN MON TIENG ANH 6 NAM 2017 2018 CO DAP AN PHONG GD DT HUYEN TRUC NINH 4784
Lớp 6 Tiếng Anh DE THI CHON HOC SINH GIOI CAP HUYEN MON TIENG ANH 6 NAM 2017 2018 CO DAP AN PHONG GD DT HUYEN TRUC NINH 4784
4) What does the word “them” refer to? A. computers C. pictures or written materials B. only pictures D. only written materials