Are some of president lincoln’s ideas considered contradictory?

 The correct answer is :  President Lincoln did not believe he had the power to end slavery because it was evil, but he believed he could end it to preserve the Union. He worked with the radicals but also resisted them, he used them as he did with the conservatives. As chief magistrate he made a clear distinction between his personal beliefs and his official actions.

the answer is a) to be able to obey them.

the correct answer is b.