Read the Following Scenario and Answer the Question Below

Read the following scenario and answer the question below.
Many biologists and environmental educators are interested in maintaining biodiversity in urban landscapes, where preserves or reserves are scarce unless land has been set aside for them in urban planning. Nonetheless, they have discovered that making even small changes in commercial and residential landscaping can help promote biodiversity. Some of the changes that have been recommended and are having success are using native species for street trees and for decorative landscaping, reducing pesticide use on lawns and gardens and reducing fertilizer use through composting and mulching. Also, managers of schools, larger businesses and residences are encouraged to increase habitat diversity by creating ʺlandscape islandsʺ that include larger trees surrounded by shrubs and herbaceous plants. Landscape islands ideally should include native species, mixed with exotic ornamentals at the discretion of the land owners.
-The butterflies you established in your yard are now thriving, but you notice that some of the caterpillars are suffering from predators and parasites. After some study and consultation, you decide to _______________.

A) give up on the butterfly species you encouraged and try to attract new species
B) resume spraying pesticides on the lawn
C) catch and kill the predators and parasites by hand
D) plant more host plants in several different areas but otherwise do nothing
E) spray pesticides on the plants to control the predators