On May 1, Sam sends Tina a letter offering to pay Tina $1,000 if Tina will promise to paint Sam's house. The offer says nothing about stipulated or authorized means of acceptance. On May 2, Tina sends Sam a letter rejecting Sam's offer. On May 3, Tina changes her mind and (saying nothing about her May 2 letter) telephones Sam and accepts the offer. On May 5, Sam receives Tina's rejection letter. Which is true?

Group of answer choices

There is a contract here

There is no contract because Tina's written rejection was effective upon dispatch

There is no contract because Sam's insanity terminated the offer on May 4

There is no contract because Tina's acceptance by telephone on May 3 was not effective