Read the passage and answer the question.
In September the Grade 7 class at Chibolya Primary prepared a vegetable garden behind the classroom block. They loosened the soil with hoes, mixed in kraal manure, and planted rows of rape, onions and Chinese cabbage before the first heavy rains. Each learner took a watering can on a duty roster. Teacher Phiri told them that mulch of dry grass would keep the soil moist. By the third week tiny green shoots had appeared.
According to Teacher Phiri, what is the purpose of the dry-grass mulch?
- ATo keep the soil moist
- BTo hide the hoes from other classes
- CTo keep birds from singing
- DTo make the classroom block taller