Answer:
c) A message was written <u>on the </u><u>CRUMPLED</u><u> yellow paper.</u>
<u />
Explanation:
<span>it means : a call to take part in a contest or competition, especially a duel.
SENTENCE : I challenge friends all of the time.
</span>
Answer:
A marginal benefit is a maximum amount a consumer is willing to pay for an additional good or service. ... The marginal benefit for a consumer tends to decrease as consumption of the good or service increases. In the business world, the marginal benefit for producers is often referred to as marginal revenue.
Explanation: