Which sentence contains an error in punctuation?

a) (d)what was the object that nerved us, or those who went before us, to this choice?

b) (a)we have gathered here to affirm a faith, a faith in a common purpose, a common conviction, a common devotion.

c) (b)some of us have chosen america as the land of our adoption, the rest have come from those who did the same.

d) (c)for this reason we have some right to consider ourselves a picked group, a group of those who had the courage to break from the past and brave the dangers and the loneliness of a strange land.

I am not too sure but I think its either A or B

Explanation:

D). This led to his first patent and a sizable financial reward while still in high school.

Explanation:

As per the question, the last option displays a fact instead of an opinion as it involves the description of an information('first patent and a sizable financial reward') that is compatible with the objective reality and possesses the ability to be verified or proved as true using evidences. The information about 'first patent or the financial award' could be verified to be true by using the past records of Dean Kamen's achievements as evidence. Thus, option D is the correct answer.