The sentence that uses Standard English is: He said he would repay the money.
Explanation:
By using the verb repay instead of pay, it's not necessary to add "back" to the sentence because it would just be redundant, as repay means to pay back. The sentence using "back" would have to be "He said that he would pay back the money". So the correct sentence is: He said he would repay the money.
Hey there! I'm pretty sure the answer is the first option: He said he would repay the money. I think this because it is not necessary in the English language to add "back" to this sentence. I hope this helped!
A feature of imperfect competition is <u>economies of scale</u>, which means that as the firm expands its production, average costs of production fall. Therefore, the firm can <u>decrease</u> its costs of production by selling internationally.
