Task: Question Answering
Input (English): How does the buying and selling of a popular species of rainforest animal as pets have a negative effect on the rainforest ecosystem?  
 (A) The rate of photosynthesis may decrease. (B) There is a probability of genetic variability. (C) The number of symbiotic relationships increases. (D) It could lead to the potential extinction of those animals.
Output (English): D