Hat is the best way to punctuate the end of this quotation? “ouch! lou cried. a. “ouch! ” b. “ouch’! c. “ouch! d. “ouch”!

Your answer is A. "Ouch!" 

There is no comma and you place the exclamation point inside quotation marks. There is no comma. The tag doesn’t begin with a cap since it’s part of the same sentence, even though there’s a question mark in the middle of the sentence. 
You can use this same construction for the the question mark.

 

A. "Ouch!" Punctuation should be inside the quotation :)

Difficulty getting a loan or credit cardan increase in debtdifficulty keeping assetsa loss of moneydifficulty landing a new job