Digitally downloads are greatly affecting the music industry

[BTGmoderatorDC]

Digitally downloads are greatly affecting the music industry, an unpredictable and ever-changing economic market.


A) Digitally downloads are greatly affecting the music industry, an unpredictable and ever-changing economic market

B) The music industry, an unpredictable and ever-changing economic market, is being greatly affected by digital downloads

C) Digitally downloads are greatly affecting the music industry, which is an unpredictable and ever-changing economic market

D) Digital download are greatly affecting the music industry, an unpredictable and ever-changing economic market

E) Digital downloads are greatly affecting the music industry, an unpredictable and ever-changing economic markets

OA B

Source: Economist Gmat

[JUHIN_GMAT]

I could not make it why E is wrong?
Can someone please help me identify the error?

Digital downloads are greatly affecting the music industry, an unpredictable and ever-changing economic markets

SVA is maintained & ", an unpredictable and ever-changing economic markets " this is modifying the music industry. SO why it is in correct?
In B, it is also seems OK, though unnecessary passive usage, i discarded it for this only.<i class="em em-cold_sweat"></i>