Unless you accept his 'final offer' your negotiation opponent ...

[futuristic]

Unless you accept his 'final offer' your negotiation opponent threatens to scrap the whole deal:
 a. His threat is more believable if both parties would be harmed by scrapping the deal
  b. His threat is more believable if he has invested resources that lower his return to other options
  c. His threat is more believable if he puts his threat 'in writing'
  d. His threat is more believable if he has balked at this course of action in the past

Question 2

As long as marginal cost is less than average variable cost:
 a. both average total costs and average variable costs will be falling.
  b. average total costs will be falling but average costs may be rising or falling.
  c. average fixed costs are rising.
  d. average total costs are falling but average fixed costs may be rising.

[macagn]

Answer to Question 1

b

Answer to Question 2

a

[futuristic]

Excellent

[Perkypinki]

Gracias!