补充材料3题

以下是引用Aren在2003-5-28 7:38:00的发言：
Federal incentives now encourage investing capital in commercial office buildings despite vacancy rates in existing structures that are exceptionally high and no demand for new construction.
(A) investing capital in commercial office buildings despite vacancy rates in existing structures that are exceptionally high and
(B) capital investment in commercial office buildings, even though vacancy rates in existing structures are exceptionally high and there is
(C) capital to be invested in commercial office buildings even though there are exceptionally high vacancy rates in existing structures with
(D) investing capital in commercial office buildings even though the vacancy rates are exceptionally high in existing structures with
(E) capital investment in commercial office buildings despite vacancy rates in existing structures that are exceptionally high, and although there is

State officials report that soaring rates of liability insurance have risen to force cutbacks in the operations of everything from local governments and school districts to day-care centers and recreational facilities.
(A) rates of liability insurance have risen to force
(B) rates of liability insurance are a force for
(C) rates for liability insurance are forcing
(D) rises in liability insurance rates are forcing
(E) liability insurance rates have risen to force
The key is C
Why not B

Margaret Courtney-Clarke has traveled to remote dwellings in the Transvaal to photograph the art of Ndebele women,( whose murals are brilliantly colored, their geometrical symmetries embellished with old and new iconography and in a style that varies from woman to woman and house to house).
(A) whose murals are brilliantly colored, their geometrical symmetries embellished with old and new iconography and in a style that varies from woman to woman and house to house
(B) whose murals are brilliantly colored, their geometrical symmetries are embellished with old and new iconography, and their style is varying among women and houses
(C) whose murals are brilliantly colored, their geometrical symmetries are embellished with old and new iconography, and they are in styles that vary from woman to woman and house to house
(D) with murals brilliantly colored, their geometrical symmetries embellished with old and new iconography, and their style varies among women and houses
(E) with murals that are brilliantly colored, their geometrical symmetries embellished with old and new iconography, and their styles vary among women and houses

Anyone can tell me how I consider this exercise at first?