For the Following Sentences, Select the Letter of the Incorrect

Multiple Choice

For the following sentences, select the letter of the incorrect past tense verb in each group. Despite such challenges, on March 13, 2012, a Siberian research institute with access to mammoth remains signed an agreement with one of the world's most controversial geneticists, Hwang Woo-Suk of South Korea. They sayed that they would clone a mammoth together.

A) signed
B) sayed