1.The cottontail rabbit population in Orange County, California, has increased unchecked in recent years as a result of the removal of the native fox population and the clearing of surrounding woodlands.

A. years as a result of the removal of
B. years as a result of removing. Felt C was better because the removing ... and the clearing
C. years, resulting from the removing of
D. years, which is result of removing
E. years, which is a result of the removal of

2.In human hearing, subtle differences in how the two ears hear a given sound help the listener determine the qualities of that sound.
A. in how the two ears hear a given sound help the listener determine
B. in the two ears hearing a given sound help the listener in determining
C. in how a sound is heard by the two ears helps the listener determine
D. between how the two ears hear a given sound helps the listener in determining
E. between how a sound is heard by the two ears help the listener in determining ( Between X and Y is the coorect idiom)

3.A recent United States Census Bureau report shows that there are more than three times as many households where the children and grandchildren are living in their grandparents’ home as compared to households where the grandparents are living in their children’s or grandchildren’s home.
(A)as compared to households where the ( as and compared to are doing the same work.)
(B)as there are households where the
(C)as those whose
(D)than compared to those where the ( as many ..... as
(E)than there are whose

1 The cottontail rabbit population in Orange County, California, has increased unchecked in recent years as a result of the removal of the native fox population and the clearing of surrounding woodlands.
A. years as a result of the removal of - CORRECT-removal of is correct idiomatic usage
B. years as a result of removing
C. years, resulting from the removing of
D. years, which is result of removing
E. years, which is a result of the removal of

2.In human hearing, subtle differences in how the two ears hear a given sound help the listener determine the qualities of that sound.
A. in how the two ears hear a given sound help the listener determineCORRECT - help needed for plural construction with differences. Also, unlike B, this is in active voice
B. in the two ears hearing a given sound help the listener in determining
C. in how a sound is heard by the two ears helps the listener determine
D. between how the two ears hear a given sound helps the listener in determining
E. between how a sound is heard by the two ears help the listener in determining

3.A recent United States Census Bureau report shows that there are more than three times as many households where the children and grandchildren are living in their grandparents’ home as compared to households where the grandparents are living in their children’s or grandchildren’s home.
(A)as compared to households where the
(B)as there are households where theCORRECT parallel construction
(C)as those whose
(D)than compared to those where the
(E)than there are whose