Poor supply chain management practices can _ to an otherwise excellent marketing strategy.

Agree with all> Thank you so much for giving your valuable views and answer

Dear Wasi, 

The option A seems to be the logical choice, as others have pointed out. However, I believe that understanding the potential extent of the "damage", what kind of damage and how to avoided is more important to your question that simply agreeing on "damage" per se. 

I have found two articles (one of them is a thesis from the Department of the US Air Force Air Univesity) that try to explain the potential damage "bad practices" in SCM could impart in a company: 

https://www.google.tt/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0CC4QFjAC&url=http%3A%2F%2Fwww.dtic.mil%2Fcgi-bin%2FGetTRDoc%3FAD%3DADA559397&ei=9RAtVe-eL8vnsAXp5YCIDg&usg=AFQjCNEULiWSLcyHdl5Xfii3TZ_0J4MKLg&sig2=8QTipwT3ZelawA88ruutDQ&bvm=bv.,d.b2w

https://www.google.tt/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CCEQFjAA&url=http%3A%2F%2Fwww.researchgate.net%2Fprofile%2FSubba_Rao5%2Fpublication%2F_The_impact_of_supply_chain_management_practices_on_competitive_advantage_and_organizational_performance%2Flinks%2F02e7ed0000000.pdf&ei=vRAtVYmUOMiqNuP-gcgM&usg=AFQjCNE6AkOLLT0F4nl0G-ySFAHI9YbUBA&sig2=l4KqB62Id45NplO_g_afqQ&bvm=bv.,d.b2w

Hope you enjoy the reading. 

My answer is A.............. do serious damage.

A. >>>>>>>>>>>>>>do serious damage

is the most accurate answer I would say.

A. do serious damage in a whole organization..

option A. is the right answer

my answer is A . DO serious damage

I agree with the above answers poor supply chain management will cause serious damage to any organization and not only the marketing strategy will fail but also the vision & the mission of the organization will be gradually changed . so the answer is A

The answer is all of the above, of course,

A. do serious damage __________________

Poor supply chain management practices can _ to an otherwise excellent marketing strategy.    A. do serious damage