Read this sentence about garden design from paragraph 6.
Incorporate sustainable gardening techniques such as:
using native plants, composting, mulching, applying an
integrated pest management approach, creating a habitat
for wildlife, using water wisely or installing a rain barrel.
The author includes this sentence most likely to emphasize that -
A only plants native to the region should be grown in a community garden
B every garden has different requirements and should be accessible to all
C no community garden should go without each of these techniques
D there are multiple methods to consider when designing a garden