At the time of signing, what was the title of the man who is the first of the two names in the name of the 1901 treaty that nullified the clayton-bulwer treaty? 403 points

The Clayton - Bulwer Treaty was negotiated in 1850 by John M. Clayton and Sir Henry Lytton Bulwer to build the Nicaragua Canal that would connect the Pacific and the Atlantic. It was a treaty between the United States and the United Kingdom. One of the essential points of the treaty was not to obtain or maintain exclusive control of the canal. However, there were disagreements because of the United Kingdom's control of territories surrounding the Nicaragua Canal. The United States wants the canal to be open to all nations equally thus, giving birth to Hay-Pauncefote Treaty that nullified the first treaty. It was signed by US Secretary of State (to answer the question) John Hay and British Ambassador to the United States Lord Pauncefote on the 18th of November 1901. 

The correct answer is d