What did the scientists do to find out if the e－nose worked？A. They presented it with

What did the scientists do to find out if the e-nose worked？

A. They presented it with all common crops..

B. They fixed 13 sensors inside the device.

C. They collected different damaged leaves.

D. They made tests on damaged and healthy leaves.

请帮忙给出正确答案和分析，谢谢！