Answer:
B. Europeans were troubled by the existence of slavery.
Explanation:
the answer is “jenner devoted more time to the vaccine than to his private practice”
B. Is my report long enough?
The correct answer is ( A )
This article is about an invention called ReWalk uses robotic pants with sensors and motors to allow people in wheelchairs to walk. The other statements (B), (C) and (D) are secondary ideas which expand the main concept or thesis statement.