For ten years, commercial shrimp boats in the country of Valaria have been 2 y1 [" c. e, E2 F# Y
using devices designed to prevent sea turtles, which are an endangered 7 b p- t$ q( C
species, from being entangled in their nets. The sea-turtle population in
, [ x; C& a% t" B$ ^3 I5 w' s. F* RValarian waters has increased over the past ten years. Since no other 2 f2 W& j3 ?7 V. P( U
measures to protect sea turtles have been taken, the population increase
`2 }; d' L/ Z% q6 w7 v1 Gmust in large part be due to the use of the devices., _2 `! t3 z& w! N8 r
Which of the following, if true, most strengthens the argument?
3 b4 h" l3 S9 o0 h A The number of commercial shrimp boats fishing in Valarian waters is ) X) F3 u: o6 @: F8 I. [
much larger now than it was ten years ago. ^& |6 Z2 L, E5 e
B The number of sea turtles using Valarian beaches for their nests is ( i) P2 D0 @* q; n# b
larger now than it was ten years ago. $ |: J. [: I6 b" A2 M1 |
C The devices have to be imported into Valaria because they are not % y2 v5 s9 P% q- }
being manufactured there.
' v! V/ H+ B Z1 h# _# K0 j2 N8 N D Sea turtles that get entangled in the nets of shrimp boats can do con-9 ?, W3 H P, M. _: R
siderable damage to those nets.
% K7 i( |2 l3 ^7 c# J" V E The use of the devices to prevent sea turtles from being entangled
6 |% o& _; B4 ~4 P in shrimp nets does not significantly affect the amount of shrimp that ! ~4 R" p& | i
can be caught in the nets. ( o5 c6 ^9 i4 b# O: y
答案A |