Suppose you are a suppler participating in an open-bid descending auction to BUY. Suppose your cost to produce the part is $10. Suppose the auction utilizes a minimum decrement of $1. Consider two scenarios wherein the current auction price is respectively $10.5 and $9.5. In these scenarios, should you bid lower and claim the winning positon?

a. Yes at $10.5, No at $9.5

b. Yes at $10.5, Yes at $9.5

c. No at $10.5, No at $9.5

d. No at $10.5, Yes at $9.5