When the steam engine came, handloom weaving naturally declined.
A、The emergence of steam engine naturally stimulated the development of handloom weaving.
B、The emergence of steam engine naturally caused the improvement of handloom weaving.
C、The emergence of steam engine naturally caused the weakening of handloom weaving.
D、The emergence of steam engine naturally caused the reform of handloom weaving.
【正确答案】：C
【题目解析】：从各选项可知，此题的关键在于掌握decline的含义,decline有“下降，衰落”之意，与选项C中的weaken含义相同，而选项A中的stimulate指“促进，激发，激励”，选项B中的improvement指“改善，改良"，选项D中的reform指“改革"，均与题意不符合。答案为C。
