Choose the best option A, B, C or D to complete the passage

Choose the best option A, B, C or D to complete the passage.
A species that faces over exploitations is one (1)
may become severely endangered or
even extinct due to the rate in which the species is being used. Unrestricted whaling during the 20th
century is an example of over exploitation and the whaling (2)
brought many species of
whales to extremely low population sizes. When several whale species were nearly extinct, a (3)
of nations agreed to abide by an international moratorium on whaling. Due to this
moratorium, some whale species, such as the grey whale, have made remarkable comebacks, while
others remain threatened or endangered.
the trade in animal part, many species continue to suffer high rates of exploitation.
Even today, there are (5)
for items such as rhino horns and tiger bones in several areas of
Asia. It is here that there exits a strong market for traditional medicines made from these animal parts.
1. A. that
D. where
B. who
B. employment
B. number
C. whom
C. agency
C. sum
C.
C.
2. A. company
3. A. total
4. A. Due to
5. A .requirement
B. Although
B. suggestions
Because
demands
D. industry
D. crowd
D.
D. wishes
However