Answer: the answer is B
Explanation: by stating that with tablets, people read 30% slower, it means that book reader is better than reading online, so that is the author's claim.
The sentence that indicated Great Britain protected the American colonies for mutual gain is A) But she (Britain) has protected us, say some. That she hath engrossed us is true, and defended the continent at our expense as well as her own is admitted, and she would have defended Turkey from the same motive, viz., the sake of trade and dominion.
Two should be the answer ( sorry if it is not it is what I have learned but It could be wrong sorry)