The section of the timeline Ben Franklin negotiated and signed the Treaty of Alliance is "section 2."
The Treaty of Alliance was negotiated and signed in February 1778 when the United States was still fighting the American War of Independence against the British.
The Treaty was reached and concluded a few months after the Battle of Saratoga.
The treaty covered the Treaty of Amity and Commerce and the Treaty of Alliance with France.
Hence, in this case, it is concluded that the correct answer is option B. "2."
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