Mckenna offers to sell lori her collection of hand-painted european tiles. before lori has a chance to accept, mckenna says, "sorry, i changed my mind. i'm not going to sell the tiles." mckenna has just made:
a. a counteroffer.
b. a revocation.
c. restitution.
d. a rejection.

a revocation

Explanation: In simple words, a revocation refers to a official cancellation of a promise, decision or a decree. In other words, when someone disagrees to perform am task they promised to perform earlier is called a revocation.

In the given case, McKenna first offers to make a sale to lori but refuses the agreement after some time.

Hence the above case depicts the concept of revocation

answer; first blank(1); 30% two(2); salmonella; i believe this is correct; //good luck;