To answer this question, you need to identify the mistakes in the given sentence and count them. Let's go through each option to understand why it is correct or incorrect:

Option A) 1 - This option is incorrect because there are more than 1 mistake in the sentence.

Option B) 2 - This option is incorrect because there are more than 2 mistakes in the sentence.

Option C) 3 - This option is correct because there are 3 mistakes in the sentence. The mistakes are:

1. The name "jack" should be capitalized as "Jack".
2. The past tense of "run" is "ran" instead of "runned".
3. "across" should be followed by "the" before "finish line". Therefore, it should be "across the finish line".

Option D) 4 - This option is incorrect because there are not 4 mistakes in the sentence.

The correct answer is C) 3. This option is correct because there are 3 mistakes in the sentence, as explained above.

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