You have a requirement for commercial items outside the United States valued at $922,422 that the agency head has determined are to be used to facilitate defense against biological attack. You intend to base your award decision on price and price-related factors and you want the flexibility to negotiate prices received in response to the solicitation. Which of the following methods of contracting can you use for this requirement?

a. Simplified acquisition procedures

b. Sealed bidding

c. Contracting by negotiation

d. Two-step sealed bidding

e. Broad agency announcement with peer or scientific review

f. A-E selection procedures

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