Which common grammatical error is shown in the sentence below? I am going on vacation to New York and I can't wait!

A.
run–on sentence
B.
comma splice
C.
subject/verb agreement
D.
sentence fragment
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However, the idea of real-life people living in what would become the united states for thousands of years before columbus ever left spain never dawned on me. what would be the best way to revise this sentence for greater clarity? a) however, the fact that columbus left spain thousands of years after people settled what would become the united states never dawned on me. b) it never dawned on me, however, the idea of real-life people living in what would become the united states for thousands of years before columbus ever left spain. c) however, the fact that people were already living in what would become the united states for thousands of years before columbus ever left spain never dawned on me. d) however, the idea never dawned on me that long before columbus ever left spain, real-life people lived for thousands of years in what would become the united states.

How does shakespeare transform the myth of phoebus and daphne to dramatize this theme?

Why should college athletes should not get paid conclusion a. state the name in a new way: b. remind the audience why the issue matters