See the multi-choice question below:

Sentence 1: Further, our work has shown that U.S. agencies have benefited from their use of results-oriented performance agreements for political and senior career executives.

Sentence 2: Our work has proven that US agencies do not interact with political and senior career executives.

If the first sentence is true, then is the second sentence true?
(1). yes; (2). it is not possible to tell; (3). no;
(3).