Collusion or bid-rigging between bidders is called

Detailed Explanation:

Rationale for Correct Answer: One form of bid-rigging occurs when colluding vendors agree that one will submit a low bid and later withdraw it , allowing another conspirator to win the contract. This practice is sometimes referred to as “ complementary bidding ” or the withdrawal of low bids .

Analysis of Incorrect Options:

A. Bribery receipt – Refers to corrupt payments, not collusion.

B. Bid solicitation – The process of inviting bids, not collusion.

D. Contract acceptance – A legitimate procurement step, not fraud.

Key Concept: Bid-rigging through collusion — vendors withdrawing low bids to favor co-conspirators.