Final answer:
The two shared ideas are Abraham Lincoln's concern about angering border states and the beneficial impact of allowing African Americans to serve in the Union Army during the Civil War.
Step-by-step explanation:
The two ideas shared by the passages provided are that Abraham Lincoln was concerned about angering the border states (option a), and that the decision to allow African Americans to join the Union Army was beneficial to the Union (option e). Both passages discuss Lincoln's considerations regarding the border state loyalties and the military implications of allowing African Americans to become soldiers in the context of the Civil War. It's emphasized that his administration was initially hesitant due to potential political consequences but later recognized the strategic advantage this decision provided.
Option a is clearly supported in both passages, where Lincoln's concern about the reaction of the border states to his policies is noted. Similarly, option e is supported by the second passage, where it's mentioned that the enlistment of African Americans added valuable manpower to the Union cause, bolstering the army with more soldiers.