On September 1, Roofer and Owner form a contract under which (a) Roofer will repair Owner's roof on or before October 1 and, in exchange, (b) Owner will pay him $1,500.For this question, assume that on September 12 Owner speaks to Roofer: "I'd like you also to replace my gutters. If you agree, I'll give you until October 3 to finish the whole job — roof and gutters. Will you do that without any increase in price?" Roofer replies, "Certainly. I'll finish the roof repair and the gutter replacement by October 3." After the September 12 conversation, Roofer is obliged by contract to
A.repair the roof by October 1 and replace the gutters by October 3.
B.repair the roof and replace the gutters, all by October 3.
C.repair the roof by October 1 and nothing more.
D.do nothing.