One immediate legacy of America’s recent mortgage crisis is the realization that credit may never again be so easily available.
a) is the realization that credit may never again be so easily available
b) are the realizations that credit may never again be so easily available
c) is realizing that credit may never again be so easily available
d) is to realize that credit may never again be so easily available
e) is realizing that credit will never again be so easily available
One Legacy, a noun and the realization, another noun go in //. So, A is the choice. Others such as realizing, and to realize as in C, D and E are out. One legacy and are in B is SV error.
A similar example, in which the consensus answer is B, is given below. Of course, no one knows the source.
One legacy of Madison Avenue's recent campaign to appeal to people fifty years old and over is the realization that as a person ages, their concerns change as well.
A. the realization that as a person ages, their
B. the realization that as people age, their
C. to realize that when a person ages, his or her
D. to realize that when people age, their
E. realizing that as people age, their