Select the letter of the INCORRECTLY written sentence.

a.
Wishing he had bought a gift sooner, Ali quickly got in his car. He had forgotten that the party was today.

b.
Wishing he had bought a gift sooner, Ali quickly got in his car; he had forgotten that the party was today.

c.
Wishing he had bought a gift sooner. Ali quickly got in his car. Since he had forgotten that the party was today.

d.
Since he had forgotten that the party was today, Ali quickly got in his car, wishing he had bought a gift sooner.