The girl scouts of Daet Elementary School have 120 kilos of empty plastic bottles collected in three months. How many kilograms of empty plastic bottles they have collected every week?, a. 5 kg., b. 10 kg, c. 15 kg., d. 20 kg

The girl scouts of Daet Elementary School have 120 kilos of empty plastic bottles collected in three months. How many kilograms of empty plastic bottles they have collected every week?