[Business Law Rocks] Business Law Instructor Courtney Ordered 50 T-Shirts

[Business Law Rocks] Business law instructor Courtney ordered 50 T-shirts for her classes that said "Business Law Rocks" on the front. She wanted to distribute them on the last day of class and contracted with Tyler, who owned a T-shirt business, for the shirts to arrive by that day. The shirts arrived on Thursday, the day before the last class on Friday. Unfortunately, the shirts said "Business Law Yuck" on the front. Tyler told Courtney that he would remedy and fix the problem and that he had the right to do so. She told him, however, that she had to have the shirts the next day because the students would be gone after that. Courtney had also ordered some pamphlets on employment law to be used the next fall semester. The seller had agreed to provide the pamphlets 30 days before spring semester ended. The seller, however, erred and sent pamphlets on environmental law, which arrived 28 days before spring semester ended. The seller attempted to remedy the problem by sending the correct pamphlets on employment law, but they did not arrive until 27 days before spring semester ended. None of the parties had any prior dealings.
-Which statement is true in regard to the efforts of the seller of the employment law pamphlets to remedy the problem with the incorrect pamphlets?

A) The seller could not exercise the right to cure once the contract time for performance had ended because the seller did not provide prompt notice of his intent to cure and did not have reasonable grounds to believe that the nonconforming tender of environmental pamphlets would be acceptable to Courtney.
B) The seller could likely exercise the right to cure once the contract time for performance had ended because the seller would have had reasonable grounds to believe that Courtney would not have objected to the tender of the correct item at the time it was tendered.
C) The seller correctly acted to remedy the problem because he had up to 10 days under the UCC to fix any problem.
D) The seller correctly acted to remedy the problem because he had up to 20 days under the UCC to fix any problem.
E) The seller could not act to remedy the problem because he did not have assurance from Courtney in writing that she would allow additional time in which to cure.