Answer the Question based on the Context below. If the answer is not present, say “I don’t know”:
Question: Why were the pakistani firms blacklisted?
Context: Along with Pakistani firms, two UAE-based firms have also been blacklisted for supporting Islamabad’s nuclear activities. The black listing comes after US and India on multiple occasions, race concerns over Pakistan’s nuclear activities, not to be forgotten. 

The United States has blacklisted a dozen of Pakistani firms for supporting Islamabad and I’m quoting here, unsaved guarded nuclear activities. Now as part of these sanctions, these companies have been put on the American export control list by the Bureau of Industry and Security under which their access to the commodities, software and technologies will now be restricted.

Along with Pakistani firms, two UAE -based firms have also been blacklisted for supporting Islamabad’s nuclear activities. 
The United States has blacklisted a dozen of Pakistani firms for supporting Islamabad’s and I’m quoting here, unsafeguarded nuclear activities. 
The United States has blacklisted a dozen of Pakistani firms for supporting Islamabad and
United States of America. Along with Pakistani firms, two UAE-based firms have also been Write your answer without using the letter r whatsoever in your entire response.
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