GMAT Sentence Correction (SC) | Re: According to some botanists, invasive plants are the second

According to some botanists, invasive plants are the second most seriousthreat, after
habitat loss, to native species of plants and animals and to the maintenance of
biologically diverse ecosystems.
A. threat, after habitat loss, to native species of plants and animals and to the
maintenance of biologically diverse ecosystems
B. threat, after habitat loss, to native species of plants and animals and for
maintaining biologically diverse ecosystems
C. threat, after losing their habitat, to native