70.

Answer and Explanation

Your Answer is

Correct Answer is J

Explanation

The subject of the sentence instant replay predicate became, so no new sentence can appear in the underlined part, F is wrong.

G item: two parallel sentences of and need a comma, so it is wrong.

Item H: and is not a complete sentence, wrong.

Item J: Changing guides the result adverbial, modifies the previous main clause, correct.