Problem statement: In responses collected from online survey, How to eliminate multiple representations from same company

Assuming that I intend to get one (and only one) response from each company for analysis. In the process of survey, I sent out to a large distribution and there are multiple responses from single company. What is the best process to pick one response before starting the analysis.
(eg. Company 1 - 10 responses, Company 2 - 15 responses, Company 3,4,5 - 1 each).

Unit of Analysis is Company. How to pick 1 response from Company 1 and 2 so that the analysis is not biased.

Some thoughts
a. Pick a response randomly and ignore the others
b. Follow below strategy to narrow
i. Ignore partial responses
ii. Go-Thro' answers and remove not worthy responses - Like Yes for All etc
[inconsistency score . e.g..
iii. Choose based on responses to priority questions
iv. Finally choose based on designation
c. Apply somelogic to group the responses into a single response

Please provide the best way to handle this issue and provide references

Regards
Lakshmanan