(2.09, lc) select the word that best completes the sentence: when joining two independent clauses with a comma, a needs to accompany the comma

The career that i have* decided to present this year is photography. photographers use both aritficial and natural lighting*use a transition sentence when going into the 2nd paragraphso.. photographer? *in order for me to be a photographer* scratch "accomplish this ranking" then say, i must first.. and continue on the sentence instead of different use various*