The law of supply states that
a. as prices fall, so will supply, and as prices rise, so will supply.
b. as prices rise, so will supply, and as prices fall, so will supply.
c. as demand rises, supply will fall, and vice versa.
d. as demand falls, supply will rise, and vice versa.

b.provides a written record of the transaction

b. after i get up in the morning,

explanation:

after is a subordinating conjunction that introduces a time clause. time clauses are dependent clauses used to indicate when something happened.

the clause "after i get up in the morning" tells when the action in the main clause (drinking a cup of coffee) happens:

"after i get up in the morning, i drink a cup of coffee." it is the most logical choice of all.