Answer F – No change. KEEP F because it is in a leading Prepositional Phrase and correctly places a Comma at the end because it is a NATURAL PAUSE. Also, this could automatically ELIMINATE J, but we’ll go through the process.
Answer G ELIMINATE G because there is no NATURAL PAUSE after length. Plus, it would make of twenty-two feet a Parenthetical; remove it and the sentence doesn’t make sense.
Answer H ELIMINATE H because this ends in a Semi-Colon, which means the clauses before and after the Semi-Colon are INDEPENDENT clauses and could be complete sentences on their own. The leading Prepositional Phrase — But at a length of twenty-two feet — is not an INDEPENDENT clause.
Answer J ELIMINATE J because there needs to be a Comma at the end of the Dependent Clause/Prepositional Phrase because there is a NATURAL PAUSE.
The Correct Answer is